Home / 129,024.12-178,071.66-72,439.32

Finding the Fourth Proportional to 129,024.12, 178,071.66 and 72,439.32

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Solution

The fourth proportional to 129,024.12, 178,071.66 and 72,439.32 is: 99,976.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,024.12 : 178,071.66 = 72,439.32 : x
  2. Step 2: Convert to fraction form
    129,024.12/178,071.66 = 72,439.32/x
  3. Step 3: Cross multiply
    129,024.12x = 178,071.66 × 72,439.32
  4. Step 4: Simplify right side
    129,024.12x = 12,899,389,961.67
  5. Step 5: Solve for x
    x = 12,899,389,961.67/129,024.12
  6. Step 6: Final answer
    x = 99,976.58

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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.