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Finding the Fourth Proportional to 128,084.48, 176,762.50 and 70,731.90

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Solution

The fourth proportional to 128,084.48, 176,762.50 and 70,731.90 is: 97,613.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,084.48 : 176,762.50 = 70,731.90 : x
  2. Step 2: Convert to fraction form
    128,084.48/176,762.50 = 70,731.90/x
  3. Step 3: Cross multiply
    128,084.48x = 176,762.50 × 70,731.90
  4. Step 4: Simplify right side
    128,084.48x = 12,502,747,473.75
  5. Step 5: Solve for x
    x = 12,502,747,473.75/128,084.48
  6. Step 6: Final answer
    x = 97,613.29

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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.