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Finding the Fourth Proportional to 97,649.20, 146,128.20 and 66,545.20

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Solution

The fourth proportional to 97,649.20, 146,128.20 and 66,545.20 is: 99,582.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,649.20 : 146,128.20 = 66,545.20 : x
  2. Step 2: Convert to fraction form
    97,649.20/146,128.20 = 66,545.20/x
  3. Step 3: Cross multiply
    97,649.20x = 146,128.20 × 66,545.20
  4. Step 4: Simplify right side
    97,649.20x = 9,724,130,294.64
  5. Step 5: Solve for x
    x = 9,724,130,294.64/97,649.20
  6. Step 6: Final answer
    x = 99,582.28

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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.