Home / 81,749.57-112,810.77-47,761.20

Finding the Fourth Proportional to 81,749.57, 112,810.77 and 47,761.20

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Solution

The fourth proportional to 81,749.57, 112,810.77 and 47,761.20 is: 65,908.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,749.57 : 112,810.77 = 47,761.20 : x
  2. Step 2: Convert to fraction form
    81,749.57/112,810.77 = 47,761.20/x
  3. Step 3: Cross multiply
    81,749.57x = 112,810.77 × 47,761.20
  4. Step 4: Simplify right side
    81,749.57x = 5,387,977,748.12
  5. Step 5: Solve for x
    x = 5,387,977,748.12/81,749.57
  6. Step 6: Final answer
    x = 65,908.34

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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.