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Finding the Fourth Proportional to 111,306.90, 153,535.14 and 90,918.54

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Solution

The fourth proportional to 111,306.90, 153,535.14 and 90,918.54 is: 125,411.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,306.90 : 153,535.14 = 90,918.54 : x
  2. Step 2: Convert to fraction form
    111,306.90/153,535.14 = 90,918.54/x
  3. Step 3: Cross multiply
    111,306.90x = 153,535.14 × 90,918.54
  4. Step 4: Simplify right side
    111,306.90x = 13,959,190,767.50
  5. Step 5: Solve for x
    x = 13,959,190,767.50/111,306.90
  6. Step 6: Final answer
    x = 125,411.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.