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Finding the Fourth Proportional to 91,148.40, 136,722.60 and 83,931.30

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Solution

The fourth proportional to 91,148.40, 136,722.60 and 83,931.30 is: 125,896.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,148.40 : 136,722.60 = 83,931.30 : x
  2. Step 2: Convert to fraction form
    91,148.40/136,722.60 = 83,931.30/x
  3. Step 3: Cross multiply
    91,148.40x = 136,722.60 × 83,931.30
  4. Step 4: Simplify right side
    91,148.40x = 11,475,305,557.38
  5. Step 5: Solve for x
    x = 11,475,305,557.38/91,148.40
  6. Step 6: Final answer
    x = 125,896.95

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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.