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Finding the Fourth Proportional to 99,409.60, 148,895.70 and 88,328.80

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Solution

The fourth proportional to 99,409.60, 148,895.70 and 88,328.80 is: 132,298.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,409.60 : 148,895.70 = 88,328.80 : x
  2. Step 2: Convert to fraction form
    99,409.60/148,895.70 = 88,328.80/x
  3. Step 3: Cross multiply
    99,409.60x = 148,895.70 × 88,328.80
  4. Step 4: Simplify right side
    99,409.60x = 13,151,778,506.16
  5. Step 5: Solve for x
    x = 13,151,778,506.16/99,409.60
  6. Step 6: Final answer
    x = 132,298.88

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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.