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Finding the Fourth Proportional to 123,615.20, 185,422.80 and 105,244.40

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Solution

The fourth proportional to 123,615.20, 185,422.80 and 105,244.40 is: 157,866.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,615.20 : 185,422.80 = 105,244.40 : x
  2. Step 2: Convert to fraction form
    123,615.20/185,422.80 = 105,244.40/x
  3. Step 3: Cross multiply
    123,615.20x = 185,422.80 × 105,244.40
  4. Step 4: Simplify right side
    123,615.20x = 19,514,711,332.32
  5. Step 5: Solve for x
    x = 19,514,711,332.32/123,615.20
  6. Step 6: Final answer
    x = 157,866.60

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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.