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Finding the Fourth Proportional to 124,639.60, 186,959.40 and 99,986.80

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Solution

The fourth proportional to 124,639.60, 186,959.40 and 99,986.80 is: 149,980.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,639.60 : 186,959.40 = 99,986.80 : x
  2. Step 2: Convert to fraction form
    124,639.60/186,959.40 = 99,986.80/x
  3. Step 3: Cross multiply
    124,639.60x = 186,959.40 × 99,986.80
  4. Step 4: Simplify right side
    124,639.60x = 18,693,472,135.92
  5. Step 5: Solve for x
    x = 18,693,472,135.92/124,639.60
  6. Step 6: Final answer
    x = 149,980.20

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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.