Home / 111,378.31-153,688.29-71,115.64

Finding the Fourth Proportional to 111,378.31, 153,688.29 and 71,115.64

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Solution

The fourth proportional to 111,378.31, 153,688.29 and 71,115.64 is: 98,130.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,378.31 : 153,688.29 = 71,115.64 : x
  2. Step 2: Convert to fraction form
    111,378.31/153,688.29 = 71,115.64/x
  3. Step 3: Cross multiply
    111,378.31x = 153,688.29 × 71,115.64
  4. Step 4: Simplify right side
    111,378.31x = 10,929,640,452.95
  5. Step 5: Solve for x
    x = 10,929,640,452.95/111,378.31
  6. Step 6: Final answer
    x = 98,130.78

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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.