Home / 52,559.16-78,858.90-21,420.60

Finding the Fourth Proportional to 52,559.16, 78,858.90 and 21,420.60

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Solution

The fourth proportional to 52,559.16, 78,858.90 and 21,420.60 is: 32,139.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,559.16 : 78,858.90 = 21,420.60 : x
  2. Step 2: Convert to fraction form
    52,559.16/78,858.90 = 21,420.60/x
  3. Step 3: Cross multiply
    52,559.16x = 78,858.90 × 21,420.60
  4. Step 4: Simplify right side
    52,559.16x = 1,689,204,953.34
  5. Step 5: Solve for x
    x = 1,689,204,953.34/52,559.16
  6. Step 6: Final answer
    x = 32,139.12

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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.