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Finding the Fourth Proportional to 81,402.40, 122,030.70 and 53,335.90

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Solution

The fourth proportional to 81,402.40, 122,030.70 and 53,335.90 is: 79,956.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,402.40 : 122,030.70 = 53,335.90 : x
  2. Step 2: Convert to fraction form
    81,402.40/122,030.70 = 53,335.90/x
  3. Step 3: Cross multiply
    81,402.40x = 122,030.70 × 53,335.90
  4. Step 4: Simplify right side
    81,402.40x = 6,508,617,212.13
  5. Step 5: Solve for x
    x = 6,508,617,212.13/81,402.40
  6. Step 6: Final answer
    x = 79,956.08

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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.