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Finding the Fourth Proportional to 99,446.19, 148,972.44 and 86,980.29

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Solution

The fourth proportional to 99,446.19, 148,972.44 and 86,980.29 is: 130,298.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,446.19 : 148,972.44 = 86,980.29 : x
  2. Step 2: Convert to fraction form
    99,446.19/148,972.44 = 86,980.29/x
  3. Step 3: Cross multiply
    99,446.19x = 148,972.44 × 86,980.29
  4. Step 4: Simplify right side
    99,446.19x = 12,957,666,033.21
  5. Step 5: Solve for x
    x = 12,957,666,033.21/99,446.19
  6. Step 6: Final answer
    x = 130,298.27

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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.