Home / 129,071.16-178,118.46-72,482.76

Finding the Fourth Proportional to 129,071.16, 178,118.46 and 72,482.76

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Solution

The fourth proportional to 129,071.16, 178,118.46 and 72,482.76 is: 100,026.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,071.16 : 178,118.46 = 72,482.76 : x
  2. Step 2: Convert to fraction form
    129,071.16/178,118.46 = 72,482.76/x
  3. Step 3: Cross multiply
    129,071.16x = 178,118.46 × 72,482.76
  4. Step 4: Simplify right side
    129,071.16x = 12,910,517,587.75
  5. Step 5: Solve for x
    x = 12,910,517,587.75/129,071.16
  6. Step 6: Final answer
    x = 100,026.35

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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.