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Finding the Fourth Proportional to 52,407.70, 78,611.55 and 42,039.70

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Solution

The fourth proportional to 52,407.70, 78,611.55 and 42,039.70 is: 63,059.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,407.70 : 78,611.55 = 42,039.70 : x
  2. Step 2: Convert to fraction form
    52,407.70/78,611.55 = 42,039.70/x
  3. Step 3: Cross multiply
    52,407.70x = 78,611.55 × 42,039.70
  4. Step 4: Simplify right side
    52,407.70x = 3,304,805,978.54
  5. Step 5: Solve for x
    x = 3,304,805,978.54/52,407.70
  6. Step 6: Final answer
    x = 63,059.55

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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.