Home / 81,475.34-121,655.62-72,987.04

Finding the Fourth Proportional to 81,475.34, 121,655.62 and 72,987.04

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Solution

The fourth proportional to 81,475.34, 121,655.62 and 72,987.04 is: 108,981.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,475.34 : 121,655.62 = 72,987.04 : x
  2. Step 2: Convert to fraction form
    81,475.34/121,655.62 = 72,987.04/x
  3. Step 3: Cross multiply
    81,475.34x = 121,655.62 × 72,987.04
  4. Step 4: Simplify right side
    81,475.34x = 8,879,283,846.47
  5. Step 5: Solve for x
    x = 8,879,283,846.47/81,475.34
  6. Step 6: Final answer
    x = 108,981.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.