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Finding the Fourth Proportional to 113,472.40, 170,273.40 and 78,437.20

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Solution

The fourth proportional to 113,472.40, 170,273.40 and 78,437.20 is: 117,700.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,472.40 : 170,273.40 = 78,437.20 : x
  2. Step 2: Convert to fraction form
    113,472.40/170,273.40 = 78,437.20/x
  3. Step 3: Cross multiply
    113,472.40x = 170,273.40 × 78,437.20
  4. Step 4: Simplify right side
    113,472.40x = 13,355,768,730.48
  5. Step 5: Solve for x
    x = 13,355,768,730.48/113,472.40
  6. Step 6: Final answer
    x = 117,700.59

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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.