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Finding the Fourth Proportional to 78,349.52, 117,538.86 and 25,761.08

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Solution

The fourth proportional to 78,349.52, 117,538.86 and 25,761.08 is: 38,646.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,349.52 : 117,538.86 = 25,761.08 : x
  2. Step 2: Convert to fraction form
    78,349.52/117,538.86 = 25,761.08/x
  3. Step 3: Cross multiply
    78,349.52x = 117,538.86 × 25,761.08
  4. Step 4: Simplify right side
    78,349.52x = 3,027,927,975.57
  5. Step 5: Solve for x
    x = 3,027,927,975.57/78,349.52
  6. Step 6: Final answer
    x = 38,646.41

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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.