Home / 81,122.10-111,947.30-45,312.64

Finding the Fourth Proportional to 81,122.10, 111,947.30 and 45,312.64

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Solution

The fourth proportional to 81,122.10, 111,947.30 and 45,312.64 is: 62,530.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,122.10 : 111,947.30 = 45,312.64 : x
  2. Step 2: Convert to fraction form
    81,122.10/111,947.30 = 45,312.64/x
  3. Step 3: Cross multiply
    81,122.10x = 111,947.30 × 45,312.64
  4. Step 4: Simplify right side
    81,122.10x = 5,072,627,703.87
  5. Step 5: Solve for x
    x = 5,072,627,703.87/81,122.10
  6. Step 6: Final answer
    x = 62,530.77

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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.