Home / 81,038.16-121,611.52-28,447.76

Finding the Fourth Proportional to 81,038.16, 121,611.52 and 28,447.76

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Solution

The fourth proportional to 81,038.16, 121,611.52 and 28,447.76 is: 42,690.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,038.16 : 121,611.52 = 28,447.76 : x
  2. Step 2: Convert to fraction form
    81,038.16/121,611.52 = 28,447.76/x
  3. Step 3: Cross multiply
    81,038.16x = 121,611.52 × 28,447.76
  4. Step 4: Simplify right side
    81,038.16x = 3,459,575,334.20
  5. Step 5: Solve for x
    x = 3,459,575,334.20/81,038.16
  6. Step 6: Final answer
    x = 42,690.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.