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Finding the Fourth Proportional to 52,418.40, 78,660 and 21,253.92

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Solution

The fourth proportional to 52,418.40, 78,660 and 21,253.92 is: 31,894.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,418.40 : 78,660 = 21,253.92 : x
  2. Step 2: Convert to fraction form
    52,418.40/78,660 = 21,253.92/x
  3. Step 3: Cross multiply
    52,418.40x = 78,660 × 21,253.92
  4. Step 4: Simplify right side
    52,418.40x = 1,671,833,347.20
  5. Step 5: Solve for x
    x = 1,671,833,347.20/52,418.40
  6. Step 6: Final answer
    x = 31,894.02

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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.