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Finding the Fourth Proportional to 156,123.70, 215,393.07 and 102,438.52

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Solution

The fourth proportional to 156,123.70, 215,393.07 and 102,438.52 is: 141,327.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,123.70 : 215,393.07 = 102,438.52 : x
  2. Step 2: Convert to fraction form
    156,123.70/215,393.07 = 102,438.52/x
  3. Step 3: Cross multiply
    156,123.70x = 215,393.07 × 102,438.52
  4. Step 4: Simplify right side
    156,123.70x = 22,064,547,309.06
  5. Step 5: Solve for x
    x = 22,064,547,309.06/156,123.70
  6. Step 6: Final answer
    x = 141,327.34

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