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Finding the Fourth Proportional to 78,695.97, 118,060.82 and 25,390.98

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Solution

The fourth proportional to 78,695.97, 118,060.82 and 25,390.98 is: 38,091.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,695.97 : 118,060.82 = 25,390.98 : x
  2. Step 2: Convert to fraction form
    78,695.97/118,060.82 = 25,390.98/x
  3. Step 3: Cross multiply
    78,695.97x = 118,060.82 × 25,390.98
  4. Step 4: Simplify right side
    78,695.97x = 2,997,679,887.66
  5. Step 5: Solve for x
    x = 2,997,679,887.66/78,695.97
  6. Step 6: Final answer
    x = 38,091.91

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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.