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Finding the Fourth Proportional to 113,323.60, 169,639.80 and 66,437.20

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Solution

The fourth proportional to 113,323.60, 169,639.80 and 66,437.20 is: 99,453.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,323.60 : 169,639.80 = 66,437.20 : x
  2. Step 2: Convert to fraction form
    113,323.60/169,639.80 = 66,437.20/x
  3. Step 3: Cross multiply
    113,323.60x = 169,639.80 × 66,437.20
  4. Step 4: Simplify right side
    113,323.60x = 11,270,393,320.56
  5. Step 5: Solve for x
    x = 11,270,393,320.56/113,323.60
  6. Step 6: Final answer
    x = 99,453.19

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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.