Home / 91,215.40-136,750.20-38,581.60

Finding the Fourth Proportional to 91,215.40, 136,750.20 and 38,581.60

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Solution

The fourth proportional to 91,215.40, 136,750.20 and 38,581.60 is: 57,841.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,215.40 : 136,750.20 = 38,581.60 : x
  2. Step 2: Convert to fraction form
    91,215.40/136,750.20 = 38,581.60/x
  3. Step 3: Cross multiply
    91,215.40x = 136,750.20 × 38,581.60
  4. Step 4: Simplify right side
    91,215.40x = 5,276,041,516.32
  5. Step 5: Solve for x
    x = 5,276,041,516.32/91,215.40
  6. Step 6: Final answer
    x = 57,841.57

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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.