Home / 128,230.75-176,958.50-71,642.13

Finding the Fourth Proportional to 128,230.75, 176,958.50 and 71,642.13

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Solution

The fourth proportional to 128,230.75, 176,958.50 and 71,642.13 is: 98,866.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,230.75 : 176,958.50 = 71,642.13 : x
  2. Step 2: Convert to fraction form
    128,230.75/176,958.50 = 71,642.13/x
  3. Step 3: Cross multiply
    128,230.75x = 176,958.50 × 71,642.13
  4. Step 4: Simplify right side
    128,230.75x = 12,677,683,861.61
  5. Step 5: Solve for x
    x = 12,677,683,861.61/128,230.75
  6. Step 6: Final answer
    x = 98,866.18

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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.