Home / 113,143.81-156,121.11-65,387.94

Finding the Fourth Proportional to 113,143.81, 156,121.11 and 65,387.94

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Solution

The fourth proportional to 113,143.81, 156,121.11 and 65,387.94 is: 90,225.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,143.81 : 156,121.11 = 65,387.94 : x
  2. Step 2: Convert to fraction form
    113,143.81/156,121.11 = 65,387.94/x
  3. Step 3: Cross multiply
    113,143.81x = 156,121.11 × 65,387.94
  4. Step 4: Simplify right side
    113,143.81x = 10,208,437,773.41
  5. Step 5: Solve for x
    x = 10,208,437,773.41/113,143.81
  6. Step 6: Final answer
    x = 90,225.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.