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Finding the Fourth Proportional to 115,065.76, 158,780.64 and 64,074.64

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Solution

The fourth proportional to 115,065.76, 158,780.64 and 64,074.64 is: 88,417.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,065.76 : 158,780.64 = 64,074.64 : x
  2. Step 2: Convert to fraction form
    115,065.76/158,780.64 = 64,074.64/x
  3. Step 3: Cross multiply
    115,065.76x = 158,780.64 × 64,074.64
  4. Step 4: Simplify right side
    115,065.76x = 10,173,812,346.97
  5. Step 5: Solve for x
    x = 10,173,812,346.97/115,065.76
  6. Step 6: Final answer
    x = 88,417.37

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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.