Home / 81,479.60-112,445-45,669.84

Finding the Fourth Proportional to 81,479.60, 112,445 and 45,669.84

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Solution

The fourth proportional to 81,479.60, 112,445 and 45,669.84 is: 63,026.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,479.60 : 112,445 = 45,669.84 : x
  2. Step 2: Convert to fraction form
    81,479.60/112,445 = 45,669.84/x
  3. Step 3: Cross multiply
    81,479.60x = 112,445 × 45,669.84
  4. Step 4: Simplify right side
    81,479.60x = 5,135,345,158.80
  5. Step 5: Solve for x
    x = 5,135,345,158.80/81,479.60
  6. Step 6: Final answer
    x = 63,026.15

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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.