Home / 81,750.72-112,818-45,938.58

Finding the Fourth Proportional to 81,750.72, 112,818 and 45,938.58

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Solution

The fourth proportional to 81,750.72, 112,818 and 45,938.58 is: 63,396.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,750.72 : 112,818 = 45,938.58 : x
  2. Step 2: Convert to fraction form
    81,750.72/112,818 = 45,938.58/x
  3. Step 3: Cross multiply
    81,750.72x = 112,818 × 45,938.58
  4. Step 4: Simplify right side
    81,750.72x = 5,182,698,718.44
  5. Step 5: Solve for x
    x = 5,182,698,718.44/81,750.72
  6. Step 6: Final answer
    x = 63,396.37

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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.