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Finding the Fourth Proportional to 112,999.85, 155,967.98 and 65,280.87

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Solution

The fourth proportional to 112,999.85, 155,967.98 and 65,280.87 is: 90,103.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,999.85 : 155,967.98 = 65,280.87 : x
  2. Step 2: Convert to fraction form
    112,999.85/155,967.98 = 65,280.87/x
  3. Step 3: Cross multiply
    112,999.85x = 155,967.98 × 65,280.87
  4. Step 4: Simplify right side
    112,999.85x = 10,181,725,426.54
  5. Step 5: Solve for x
    x = 10,181,725,426.54/112,999.85
  6. Step 6: Final answer
    x = 90,103.88

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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.