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Finding the Fourth Proportional to 124,640.10, 186,960.15 and 99,987.30

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Solution

The fourth proportional to 124,640.10, 186,960.15 and 99,987.30 is: 149,980.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,640.10 : 186,960.15 = 99,987.30 : x
  2. Step 2: Convert to fraction form
    124,640.10/186,960.15 = 99,987.30/x
  3. Step 3: Cross multiply
    124,640.10x = 186,960.15 × 99,987.30
  4. Step 4: Simplify right side
    124,640.10x = 18,693,640,606.10
  5. Step 5: Solve for x
    x = 18,693,640,606.10/124,640.10
  6. Step 6: Final answer
    x = 149,980.95

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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.