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Finding the Fourth Proportional to 140,510.79, 210,752.51 and 77,310.14

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Solution

The fourth proportional to 140,510.79, 210,752.51 and 77,310.14 is: 115,957.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,510.79 : 210,752.51 = 77,310.14 : x
  2. Step 2: Convert to fraction form
    140,510.79/210,752.51 = 77,310.14/x
  3. Step 3: Cross multiply
    140,510.79x = 210,752.51 × 77,310.14
  4. Step 4: Simplify right side
    140,510.79x = 16,293,304,613.14
  5. Step 5: Solve for x
    x = 16,293,304,613.14/140,510.79
  6. Step 6: Final answer
    x = 115,957.68

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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.