Home / 81,122.10-111,947.31-45,312.60

Finding the Fourth Proportional to 81,122.10, 111,947.31 and 45,312.60

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Solution

The fourth proportional to 81,122.10, 111,947.31 and 45,312.60 is: 62,530.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,122.10 : 111,947.31 = 45,312.60 : x
  2. Step 2: Convert to fraction form
    81,122.10/111,947.31 = 45,312.60/x
  3. Step 3: Cross multiply
    81,122.10x = 111,947.31 × 45,312.60
  4. Step 4: Simplify right side
    81,122.10x = 5,072,623,679.11
  5. Step 5: Solve for x
    x = 5,072,623,679.11/81,122.10
  6. Step 6: Final answer
    x = 62,530.72

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1.5x scale

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.