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Finding the Fourth Proportional to 66,931.94, 100,365.59 and 38,859.08

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Solution

The fourth proportional to 66,931.94, 100,365.59 and 38,859.08 is: 58,269.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,931.94 : 100,365.59 = 38,859.08 : x
  2. Step 2: Convert to fraction form
    66,931.94/100,365.59 = 38,859.08/x
  3. Step 3: Cross multiply
    66,931.94x = 100,365.59 × 38,859.08
  4. Step 4: Simplify right side
    66,931.94x = 3,900,114,086.38
  5. Step 5: Solve for x
    x = 3,900,114,086.38/66,931.94
  6. Step 6: Final answer
    x = 58,269.85

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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.