Home / 129,292.20-178,410.60-72,702.36

Finding the Fourth Proportional to 129,292.20, 178,410.60 and 72,702.36

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Solution

The fourth proportional to 129,292.20, 178,410.60 and 72,702.36 is: 100,322.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,292.20 : 178,410.60 = 72,702.36 : x
  2. Step 2: Convert to fraction form
    129,292.20/178,410.60 = 72,702.36/x
  3. Step 3: Cross multiply
    129,292.20x = 178,410.60 × 72,702.36
  4. Step 4: Simplify right side
    129,292.20x = 12,970,871,669.02
  5. Step 5: Solve for x
    x = 12,970,871,669.02/129,292.20
  6. Step 6: Final answer
    x = 100,322.15

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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.