Home / 113,815.20-170,722.80-90,314.40

Finding the Fourth Proportional to 113,815.20, 170,722.80 and 90,314.40

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Solution

The fourth proportional to 113,815.20, 170,722.80 and 90,314.40 is: 135,471.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,815.20 : 170,722.80 = 90,314.40 : x
  2. Step 2: Convert to fraction form
    113,815.20/170,722.80 = 90,314.40/x
  3. Step 3: Cross multiply
    113,815.20x = 170,722.80 × 90,314.40
  4. Step 4: Simplify right side
    113,815.20x = 15,418,727,248.32
  5. Step 5: Solve for x
    x = 15,418,727,248.32/113,815.20
  6. Step 6: Final answer
    x = 135,471.60

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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.