Home / 129,380.01-178,528.86-72,004.98

Finding the Fourth Proportional to 129,380.01, 178,528.86 and 72,004.98

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Solution

The fourth proportional to 129,380.01, 178,528.86 and 72,004.98 is: 99,358.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,380.01 : 178,528.86 = 72,004.98 : x
  2. Step 2: Convert to fraction form
    129,380.01/178,528.86 = 72,004.98/x
  3. Step 3: Cross multiply
    129,380.01x = 178,528.86 × 72,004.98
  4. Step 4: Simplify right side
    129,380.01x = 12,854,966,993.72
  5. Step 5: Solve for x
    x = 12,854,966,993.72/129,380.01
  6. Step 6: Final answer
    x = 99,358.22

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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.