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Finding the Fourth Proportional to 542,455.49, 813,737.90 and 143,123.87

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Solution

The fourth proportional to 542,455.49, 813,737.90 and 143,123.87 is: 214,700.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,455.49 : 813,737.90 = 143,123.87 : x
  2. Step 2: Convert to fraction form
    542,455.49/813,737.90 = 143,123.87/x
  3. Step 3: Cross multiply
    542,455.49x = 813,737.90 × 143,123.87
  4. Step 4: Simplify right side
    542,455.49x = 116,465,312,629.36
  5. Step 5: Solve for x
    x = 116,465,312,629.36/542,455.49
  6. Step 6: Final answer
    x = 214,700.22

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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.