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Finding the Fourth Proportional to 66,931.38, 100,364.76 and 38,858.49

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Solution

The fourth proportional to 66,931.38, 100,364.76 and 38,858.49 is: 58,268.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,931.38 : 100,364.76 = 38,858.49 : x
  2. Step 2: Convert to fraction form
    66,931.38/100,364.76 = 38,858.49/x
  3. Step 3: Cross multiply
    66,931.38x = 100,364.76 × 38,858.49
  4. Step 4: Simplify right side
    66,931.38x = 3,900,023,022.81
  5. Step 5: Solve for x
    x = 3,900,023,022.81/66,931.38
  6. Step 6: Final answer
    x = 58,268.98

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1.5x scale

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.