Home / 129,505.95-178,715.51-72,145.19

Finding the Fourth Proportional to 129,505.95, 178,715.51 and 72,145.19

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Solution

The fourth proportional to 129,505.95, 178,715.51 and 72,145.19 is: 99,558.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,505.95 : 178,715.51 = 72,145.19 : x
  2. Step 2: Convert to fraction form
    129,505.95/178,715.51 = 72,145.19/x
  3. Step 3: Cross multiply
    129,505.95x = 178,715.51 × 72,145.19
  4. Step 4: Simplify right side
    129,505.95x = 12,893,464,684.68
  5. Step 5: Solve for x
    x = 12,893,464,684.68/129,505.95
  6. Step 6: Final answer
    x = 99,558.86

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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.