Home / 128,304,088.20-192,456,132.30-87,489,419.40

Finding the Fourth Proportional to 128,304,088.20, 192,456,132.30 and 87,489,419.40

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Solution

The fourth proportional to 128,304,088.20, 192,456,132.30 and 87,489,419.40 is: 131,234,129.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304,088.20 : 192,456,132.30 = 87,489,419.40 : x
  2. Step 2: Convert to fraction form
    128,304,088.20/192,456,132.30 = 87,489,419.40/x
  3. Step 3: Cross multiply
    128,304,088.20x = 192,456,132.30 × 87,489,419.40
  4. Step 4: Simplify right side
    128,304,088.20x = 16,837,875,274,896,588
  5. Step 5: Solve for x
    x = 16,837,875,274,896,588/128,304,088.20
  6. Step 6: Final answer
    x = 131,234,129.10

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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.