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Finding the Fourth Proportional to 78,957.39, 118,454.67 and 25,649.19

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Solution

The fourth proportional to 78,957.39, 118,454.67 and 25,649.19 is: 38,479.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,957.39 : 118,454.67 = 25,649.19 : x
  2. Step 2: Convert to fraction form
    78,957.39/118,454.67 = 25,649.19/x
  3. Step 3: Cross multiply
    78,957.39x = 118,454.67 × 25,649.19
  4. Step 4: Simplify right side
    78,957.39x = 3,038,266,337.22
  5. Step 5: Solve for x
    x = 3,038,266,337.22/78,957.39
  6. Step 6: Final answer
    x = 38,479.82

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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.