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Finding the Fourth Proportional to 115,157.70, 158,915.52 and 64,856.70

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Solution

The fourth proportional to 115,157.70, 158,915.52 and 64,856.70 is: 89,501.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,157.70 : 158,915.52 = 64,856.70 : x
  2. Step 2: Convert to fraction form
    115,157.70/158,915.52 = 64,856.70/x
  3. Step 3: Cross multiply
    115,157.70x = 158,915.52 × 64,856.70
  4. Step 4: Simplify right side
    115,157.70x = 10,306,736,205.98
  5. Step 5: Solve for x
    x = 10,306,736,205.98/115,157.70
  6. Step 6: Final answer
    x = 89,501.06

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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.