Home / 45,719.20-68,643.60-28,223.20

Finding the Fourth Proportional to 45,719.20, 68,643.60 and 28,223.20

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Solution

The fourth proportional to 45,719.20, 68,643.60 and 28,223.20 is: 42,374.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,719.20 : 68,643.60 = 28,223.20 : x
  2. Step 2: Convert to fraction form
    45,719.20/68,643.60 = 28,223.20/x
  3. Step 3: Cross multiply
    45,719.20x = 68,643.60 × 28,223.20
  4. Step 4: Simplify right side
    45,719.20x = 1,937,342,051.52
  5. Step 5: Solve for x
    x = 1,937,342,051.52/45,719.20
  6. Step 6: Final answer
    x = 42,374.80

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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.