Home / 113,807.60-170,711.40-78,378.20

Finding the Fourth Proportional to 113,807.60, 170,711.40 and 78,378.20

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Solution

The fourth proportional to 113,807.60, 170,711.40 and 78,378.20 is: 117,567.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,807.60 : 170,711.40 = 78,378.20 : x
  2. Step 2: Convert to fraction form
    113,807.60/170,711.40 = 78,378.20/x
  3. Step 3: Cross multiply
    113,807.60x = 170,711.40 × 78,378.20
  4. Step 4: Simplify right side
    113,807.60x = 13,380,052,251.48
  5. Step 5: Solve for x
    x = 13,380,052,251.48/113,807.60
  6. Step 6: Final answer
    x = 117,567.30

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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.