Home / 81,557.87-112,547.99-45,747.05

Finding the Fourth Proportional to 81,557.87, 112,547.99 and 45,747.05

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Solution

The fourth proportional to 81,557.87, 112,547.99 and 45,747.05 is: 63,129.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,557.87 : 112,547.99 = 45,747.05 : x
  2. Step 2: Convert to fraction form
    81,557.87/112,547.99 = 45,747.05/x
  3. Step 3: Cross multiply
    81,557.87x = 112,547.99 × 45,747.05
  4. Step 4: Simplify right side
    81,557.87x = 5,148,738,077.56
  5. Step 5: Solve for x
    x = 5,148,738,077.56/81,557.87
  6. Step 6: Final answer
    x = 63,129.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.