Home / 128,304,671.20-192,457,006.80-87,490,002.40

Finding the Fourth Proportional to 128,304,671.20, 192,457,006.80 and 87,490,002.40

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Solution

The fourth proportional to 128,304,671.20, 192,457,006.80 and 87,490,002.40 is: 131,235,003.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304,671.20 : 192,457,006.80 = 87,490,002.40 : x
  2. Step 2: Convert to fraction form
    128,304,671.20/192,457,006.80 = 87,490,002.40/x
  3. Step 3: Cross multiply
    128,304,671.20x = 192,457,006.80 × 87,490,002.40
  4. Step 4: Simplify right side
    128,304,671.20x = 16,838,063,986,828,818
  5. Step 5: Solve for x
    x = 16,838,063,986,828,818/128,304,671.20
  6. Step 6: Final answer
    x = 131,235,003.60

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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.