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Finding the Fourth Proportional to 96,700.86, 144,389.50 and 86,640.66

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Solution

The fourth proportional to 96,700.86, 144,389.50 and 86,640.66 is: 129,368.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,700.86 : 144,389.50 = 86,640.66 : x
  2. Step 2: Convert to fraction form
    96,700.86/144,389.50 = 86,640.66/x
  3. Step 3: Cross multiply
    96,700.86x = 144,389.50 × 86,640.66
  4. Step 4: Simplify right side
    96,700.86x = 12,510,001,360.47
  5. Step 5: Solve for x
    x = 12,510,001,360.47/96,700.86
  6. Step 6: Final answer
    x = 129,368.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.