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Finding the Fourth Proportional to 91,262.40, 136,869.30 and 28,082.40

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Solution

The fourth proportional to 91,262.40, 136,869.30 and 28,082.40 is: 42,116.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,262.40 : 136,869.30 = 28,082.40 : x
  2. Step 2: Convert to fraction form
    91,262.40/136,869.30 = 28,082.40/x
  3. Step 3: Cross multiply
    91,262.40x = 136,869.30 × 28,082.40
  4. Step 4: Simplify right side
    91,262.40x = 3,843,618,430.32
  5. Step 5: Solve for x
    x = 3,843,618,430.32/91,262.40
  6. Step 6: Final answer
    x = 42,116.12

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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.