Home / 128,788,995.18-177,712,666.02-87,063,849.12

Finding the Fourth Proportional to 128,788,995.18, 177,712,666.02 and 87,063,849.12

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Solution

The fourth proportional to 128,788,995.18, 177,712,666.02 and 87,063,849.12 is: 120,137,195.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,788,995.18 : 177,712,666.02 = 87,063,849.12 : x
  2. Step 2: Convert to fraction form
    128,788,995.18/177,712,666.02 = 87,063,849.12/x
  3. Step 3: Cross multiply
    128,788,995.18x = 177,712,666.02 × 87,063,849.12
  4. Step 4: Simplify right side
    128,788,995.18x = 15,472,348,741,078,232
  5. Step 5: Solve for x
    x = 15,472,348,741,078,232/128,788,995.18
  6. Step 6: Final answer
    x = 120,137,195.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.