Home / 129,478.30-178,677.30-72,117.44

Finding the Fourth Proportional to 129,478.30, 178,677.30 and 72,117.44

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Solution

The fourth proportional to 129,478.30, 178,677.30 and 72,117.44 is: 99,520.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,478.30 : 178,677.30 = 72,117.44 : x
  2. Step 2: Convert to fraction form
    129,478.30/178,677.30 = 72,117.44/x
  3. Step 3: Cross multiply
    129,478.30x = 178,677.30 × 72,117.44
  4. Step 4: Simplify right side
    129,478.30x = 12,885,749,462.11
  5. Step 5: Solve for x
    x = 12,885,749,462.11/129,478.30
  6. Step 6: Final answer
    x = 99,520.53

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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.