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Finding the Fourth Proportional to 61,988.16, 93,005.28 and 28,724.16

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Solution

The fourth proportional to 61,988.16, 93,005.28 and 28,724.16 is: 43,096.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,988.16 : 93,005.28 = 28,724.16 : x
  2. Step 2: Convert to fraction form
    61,988.16/93,005.28 = 28,724.16/x
  3. Step 3: Cross multiply
    61,988.16x = 93,005.28 × 28,724.16
  4. Step 4: Simplify right side
    61,988.16x = 2,671,498,543.56
  5. Step 5: Solve for x
    x = 2,671,498,543.56/61,988.16
  6. Step 6: Final answer
    x = 43,096.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.