Home / 129,050.01-178,080.12-72,460.17

Finding the Fourth Proportional to 129,050.01, 178,080.12 and 72,460.17

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Solution

The fourth proportional to 129,050.01, 178,080.12 and 72,460.17 is: 99,990.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,050.01 : 178,080.12 = 72,460.17 : x
  2. Step 2: Convert to fraction form
    129,050.01/178,080.12 = 72,460.17/x
  3. Step 3: Cross multiply
    129,050.01x = 178,080.12 × 72,460.17
  4. Step 4: Simplify right side
    129,050.01x = 12,903,715,768.82
  5. Step 5: Solve for x
    x = 12,903,715,768.82/129,050.01
  6. Step 6: Final answer
    x = 99,990.04

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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.