Home / 129,525.72-178,733.28-72,159.21

Finding the Fourth Proportional to 129,525.72, 178,733.28 and 72,159.21

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Solution

The fourth proportional to 129,525.72, 178,733.28 and 72,159.21 is: 99,572.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,525.72 : 178,733.28 = 72,159.21 : x
  2. Step 2: Convert to fraction form
    129,525.72/178,733.28 = 72,159.21/x
  3. Step 3: Cross multiply
    129,525.72x = 178,733.28 × 72,159.21
  4. Step 4: Simplify right side
    129,525.72x = 12,897,252,285.51
  5. Step 5: Solve for x
    x = 12,897,252,285.51/129,525.72
  6. Step 6: Final answer
    x = 99,572.91

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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.