Home / 52,621.12-78,931.68-21,458.80

Finding the Fourth Proportional to 52,621.12, 78,931.68 and 21,458.80

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Solution

The fourth proportional to 52,621.12, 78,931.68 and 21,458.80 is: 32,188.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,621.12 : 78,931.68 = 21,458.80 : x
  2. Step 2: Convert to fraction form
    52,621.12/78,931.68 = 21,458.80/x
  3. Step 3: Cross multiply
    52,621.12x = 78,931.68 × 21,458.80
  4. Step 4: Simplify right side
    52,621.12x = 1,693,779,134.78
  5. Step 5: Solve for x
    x = 1,693,779,134.78/52,621.12
  6. Step 6: Final answer
    x = 32,188.20

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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.