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Finding the Fourth Proportional to 81,501.72, 112,472.55 and 47,507.64

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Solution

The fourth proportional to 81,501.72, 112,472.55 and 47,507.64 is: 65,560.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,501.72 : 112,472.55 = 47,507.64 : x
  2. Step 2: Convert to fraction form
    81,501.72/112,472.55 = 47,507.64/x
  3. Step 3: Cross multiply
    81,501.72x = 112,472.55 × 47,507.64
  4. Step 4: Simplify right side
    81,501.72x = 5,343,305,415.28
  5. Step 5: Solve for x
    x = 5,343,305,415.28/81,501.72
  6. Step 6: Final answer
    x = 65,560.65

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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.