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Finding the Fourth Proportional to 142,030.80, 213,046.20 and 139,957.20

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Solution

The fourth proportional to 142,030.80, 213,046.20 and 139,957.20 is: 209,935.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,030.80 : 213,046.20 = 139,957.20 : x
  2. Step 2: Convert to fraction form
    142,030.80/213,046.20 = 139,957.20/x
  3. Step 3: Cross multiply
    142,030.80x = 213,046.20 × 139,957.20
  4. Step 4: Simplify right side
    142,030.80x = 29,817,349,622.64
  5. Step 5: Solve for x
    x = 29,817,349,622.64/142,030.80
  6. Step 6: Final answer
    x = 209,935.80

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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.