Home / 81,138.18-121,411.23-47,874.18

Finding the Fourth Proportional to 81,138.18, 121,411.23 and 47,874.18

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Solution

The fourth proportional to 81,138.18, 121,411.23 and 47,874.18 is: 71,636.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,138.18 : 121,411.23 = 47,874.18 : x
  2. Step 2: Convert to fraction form
    81,138.18/121,411.23 = 47,874.18/x
  3. Step 3: Cross multiply
    81,138.18x = 121,411.23 × 47,874.18
  4. Step 4: Simplify right side
    81,138.18x = 5,812,463,079.04
  5. Step 5: Solve for x
    x = 5,812,463,079.04/81,138.18
  6. Step 6: Final answer
    x = 71,636.60

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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.