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Finding the Fourth Proportional to 78,353.64, 117,505.53 and 25,750.98

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Solution

The fourth proportional to 78,353.64, 117,505.53 and 25,750.98 is: 38,618.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,353.64 : 117,505.53 = 25,750.98 : x
  2. Step 2: Convert to fraction form
    78,353.64/117,505.53 = 25,750.98/x
  3. Step 3: Cross multiply
    78,353.64x = 117,505.53 × 25,750.98
  4. Step 4: Simplify right side
    78,353.64x = 3,025,882,552.92
  5. Step 5: Solve for x
    x = 3,025,882,552.92/78,353.64
  6. Step 6: Final answer
    x = 38,618.28

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1.5x scale

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.