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Finding the Fourth Proportional to 66,909.74, 100,332.83 and 38,838.45

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Solution

The fourth proportional to 66,909.74, 100,332.83 and 38,838.45 is: 58,239.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,909.74 : 100,332.83 = 38,838.45 : x
  2. Step 2: Convert to fraction form
    66,909.74/100,332.83 = 38,838.45/x
  3. Step 3: Cross multiply
    66,909.74x = 100,332.83 × 38,838.45
  4. Step 4: Simplify right side
    66,909.74x = 3,896,771,407.12
  5. Step 5: Solve for x
    x = 3,896,771,407.12/66,909.74
  6. Step 6: Final answer
    x = 58,239.23

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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.