Home / 81,445.42-122,184.40-28,139.32

Finding the Fourth Proportional to 81,445.42, 122,184.40 and 28,139.32

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Solution

The fourth proportional to 81,445.42, 122,184.40 and 28,139.32 is: 42,214.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,445.42 : 122,184.40 = 28,139.32 : x
  2. Step 2: Convert to fraction form
    81,445.42/122,184.40 = 28,139.32/x
  3. Step 3: Cross multiply
    81,445.42x = 122,184.40 × 28,139.32
  4. Step 4: Simplify right side
    81,445.42x = 3,438,185,378.46
  5. Step 5: Solve for x
    x = 3,438,185,378.46/81,445.42
  6. Step 6: Final answer
    x = 42,214.60

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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.