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Finding the Fourth Proportional to 94,887.17, 130,859.49 and 78,728.90

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Solution

The fourth proportional to 94,887.17, 130,859.49 and 78,728.90 is: 108,575.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,887.17 : 130,859.49 = 78,728.90 : x
  2. Step 2: Convert to fraction form
    94,887.17/130,859.49 = 78,728.90/x
  3. Step 3: Cross multiply
    94,887.17x = 130,859.49 × 78,728.90
  4. Step 4: Simplify right side
    94,887.17x = 10,302,423,702.26
  5. Step 5: Solve for x
    x = 10,302,423,702.26/94,887.17
  6. Step 6: Final answer
    x = 108,575.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.