Home / 81,945.60-122,956.80-42,547.20

Finding the Fourth Proportional to 81,945.60, 122,956.80 and 42,547.20

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Solution

The fourth proportional to 81,945.60, 122,956.80 and 42,547.20 is: 63,840.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,945.60 : 122,956.80 = 42,547.20 : x
  2. Step 2: Convert to fraction form
    81,945.60/122,956.80 = 42,547.20/x
  3. Step 3: Cross multiply
    81,945.60x = 122,956.80 × 42,547.20
  4. Step 4: Simplify right side
    81,945.60x = 5,231,467,560.96
  5. Step 5: Solve for x
    x = 5,231,467,560.96/81,945.60
  6. Step 6: Final answer
    x = 63,840.74

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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.