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Finding the Fourth Proportional to 124,554.40, 186,831.60 and 74,690.80

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Solution

The fourth proportional to 124,554.40, 186,831.60 and 74,690.80 is: 112,036.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,554.40 : 186,831.60 = 74,690.80 : x
  2. Step 2: Convert to fraction form
    124,554.40/186,831.60 = 74,690.80/x
  3. Step 3: Cross multiply
    124,554.40x = 186,831.60 × 74,690.80
  4. Step 4: Simplify right side
    124,554.40x = 13,954,601,669.28
  5. Step 5: Solve for x
    x = 13,954,601,669.28/124,554.40
  6. Step 6: Final answer
    x = 112,036.20

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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.