Home / 128,252.50-176,988.45-71,663.88

Finding the Fourth Proportional to 128,252.50, 176,988.45 and 71,663.88

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Solution

The fourth proportional to 128,252.50, 176,988.45 and 71,663.88 is: 98,896.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,252.50 : 176,988.45 = 71,663.88 : x
  2. Step 2: Convert to fraction form
    128,252.50/176,988.45 = 71,663.88/x
  3. Step 3: Cross multiply
    128,252.50x = 176,988.45 × 71,663.88
  4. Step 4: Simplify right side
    128,252.50x = 12,683,679,042.19
  5. Step 5: Solve for x
    x = 12,683,679,042.19/128,252.50
  6. Step 6: Final answer
    x = 98,896.15

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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.