Home / 129,246.39-178,376.04-72,657.77

Finding the Fourth Proportional to 129,246.39, 178,376.04 and 72,657.77

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Solution

The fourth proportional to 129,246.39, 178,376.04 and 72,657.77 is: 100,276.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,246.39 : 178,376.04 = 72,657.77 : x
  2. Step 2: Convert to fraction form
    129,246.39/178,376.04 = 72,657.77/x
  3. Step 3: Cross multiply
    129,246.39x = 178,376.04 × 72,657.77
  4. Step 4: Simplify right side
    129,246.39x = 12,960,404,395.95
  5. Step 5: Solve for x
    x = 12,960,404,395.95/129,246.39
  6. Step 6: Final answer
    x = 100,276.72

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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.