Home / 129,199.50-178,292.07-71,838.95

Finding the Fourth Proportional to 129,199.50, 178,292.07 and 71,838.95

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Solution

The fourth proportional to 129,199.50, 178,292.07 and 71,838.95 is: 99,135.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,199.50 : 178,292.07 = 71,838.95 : x
  2. Step 2: Convert to fraction form
    129,199.50/178,292.07 = 71,838.95/x
  3. Step 3: Cross multiply
    129,199.50x = 178,292.07 × 71,838.95
  4. Step 4: Simplify right side
    129,199.50x = 12,808,314,210.67
  5. Step 5: Solve for x
    x = 12,808,314,210.67/129,199.50
  6. Step 6: Final answer
    x = 99,135.94

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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.