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Finding the Fourth Proportional to 115,157.92, 158,921.12 and 64,858.72

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Solution

The fourth proportional to 115,157.92, 158,921.12 and 64,858.72 is: 89,506.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,157.92 : 158,921.12 = 64,858.72 : x
  2. Step 2: Convert to fraction form
    115,157.92/158,921.12 = 64,858.72/x
  3. Step 3: Cross multiply
    115,157.92x = 158,921.12 × 64,858.72
  4. Step 4: Simplify right side
    115,157.92x = 10,307,420,424.17
  5. Step 5: Solve for x
    x = 10,307,420,424.17/115,157.92
  6. Step 6: Final answer
    x = 89,506.83

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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.