Home / 129,174.12-178,261.23-71,031.87

Finding the Fourth Proportional to 129,174.12, 178,261.23 and 71,031.87

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Solution

The fourth proportional to 129,174.12, 178,261.23 and 71,031.87 is: 98,024.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,174.12 : 178,261.23 = 71,031.87 : x
  2. Step 2: Convert to fraction form
    129,174.12/178,261.23 = 71,031.87/x
  3. Step 3: Cross multiply
    129,174.12x = 178,261.23 × 71,031.87
  4. Step 4: Simplify right side
    129,174.12x = 12,662,228,515.40
  5. Step 5: Solve for x
    x = 12,662,228,515.40/129,174.12
  6. Step 6: Final answer
    x = 98,024.50

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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.