Home / 128,304,099.20-192,456,148.80-87,489,430.40

Finding the Fourth Proportional to 128,304,099.20, 192,456,148.80 and 87,489,430.40

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Solution

The fourth proportional to 128,304,099.20, 192,456,148.80 and 87,489,430.40 is: 131,234,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304,099.20 : 192,456,148.80 = 87,489,430.40 : x
  2. Step 2: Convert to fraction form
    128,304,099.20/192,456,148.80 = 87,489,430.40/x
  3. Step 3: Cross multiply
    128,304,099.20x = 192,456,148.80 × 87,489,430.40
  4. Step 4: Simplify right side
    128,304,099.20x = 16,837,878,835,489,646
  5. Step 5: Solve for x
    x = 16,837,878,835,489,646/128,304,099.20
  6. Step 6: Final answer
    x = 131,234,145.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.