Home / 78,631.16-108,515.56-59,215.31

Finding the Fourth Proportional to 78,631.16, 108,515.56 and 59,215.31

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Solution

The fourth proportional to 78,631.16, 108,515.56 and 59,215.31 is: 81,720.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,631.16 : 108,515.56 = 59,215.31 : x
  2. Step 2: Convert to fraction form
    78,631.16/108,515.56 = 59,215.31/x
  3. Step 3: Cross multiply
    78,631.16x = 108,515.56 × 59,215.31
  4. Step 4: Simplify right side
    78,631.16x = 6,425,782,648.47
  5. Step 5: Solve for x
    x = 6,425,782,648.47/78,631.16
  6. Step 6: Final answer
    x = 81,720.56

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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.