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Finding the Fourth Proportional to 78,886.24, 118,348.20 and 25,578.24

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Solution

The fourth proportional to 78,886.24, 118,348.20 and 25,578.24 is: 38,373.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,886.24 : 118,348.20 = 25,578.24 : x
  2. Step 2: Convert to fraction form
    78,886.24/118,348.20 = 25,578.24/x
  3. Step 3: Cross multiply
    78,886.24x = 118,348.20 × 25,578.24
  4. Step 4: Simplify right side
    78,886.24x = 3,027,138,663.17
  5. Step 5: Solve for x
    x = 3,027,138,663.17/78,886.24
  6. Step 6: Final answer
    x = 38,373.47

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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.