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Finding the Fourth Proportional to 115,023.42, 158,728.42 and 64,712.70

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Solution

The fourth proportional to 115,023.42, 158,728.42 and 64,712.70 is: 89,301.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,023.42 : 158,728.42 = 64,712.70 : x
  2. Step 2: Convert to fraction form
    115,023.42/158,728.42 = 64,712.70/x
  3. Step 3: Cross multiply
    115,023.42x = 158,728.42 × 64,712.70
  4. Step 4: Simplify right side
    115,023.42x = 10,271,744,624.93
  5. Step 5: Solve for x
    x = 10,271,744,624.93/115,023.42
  6. Step 6: Final answer
    x = 89,301.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.