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Finding the Fourth Proportional to 99,458.40, 148,928.40 and 64,207.20

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Solution

The fourth proportional to 99,458.40, 148,928.40 and 64,207.20 is: 96,143.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,458.40 : 148,928.40 = 64,207.20 : x
  2. Step 2: Convert to fraction form
    99,458.40/148,928.40 = 64,207.20/x
  3. Step 3: Cross multiply
    99,458.40x = 148,928.40 × 64,207.20
  4. Step 4: Simplify right side
    99,458.40x = 9,562,275,564.48
  5. Step 5: Solve for x
    x = 9,562,275,564.48/99,458.40
  6. Step 6: Final answer
    x = 96,143.47

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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.