Home / 87,120,145.80-130,680,218.70-66,712,811.40

Finding the Fourth Proportional to 87,120,145.80, 130,680,218.70 and 66,712,811.40

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Solution

The fourth proportional to 87,120,145.80, 130,680,218.70 and 66,712,811.40 is: 100,069,217.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,120,145.80 : 130,680,218.70 = 66,712,811.40 : x
  2. Step 2: Convert to fraction form
    87,120,145.80/130,680,218.70 = 66,712,811.40/x
  3. Step 3: Cross multiply
    87,120,145.80x = 130,680,218.70 × 66,712,811.40
  4. Step 4: Simplify right side
    87,120,145.80x = 8,718,044,783,843,853
  5. Step 5: Solve for x
    x = 8,718,044,783,843,853/87,120,145.80
  6. Step 6: Final answer
    x = 100,069,217.10

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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.