Home / 81,255.12-112,135.08-45,445.02

Finding the Fourth Proportional to 81,255.12, 112,135.08 and 45,445.02

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Solution

The fourth proportional to 81,255.12, 112,135.08 and 45,445.02 is: 62,715.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,255.12 : 112,135.08 = 45,445.02 : x
  2. Step 2: Convert to fraction form
    81,255.12/112,135.08 = 45,445.02/x
  3. Step 3: Cross multiply
    81,255.12x = 112,135.08 × 45,445.02
  4. Step 4: Simplify right side
    81,255.12x = 5,095,980,953.30
  5. Step 5: Solve for x
    x = 5,095,980,953.30/81,255.12
  6. Step 6: Final answer
    x = 62,715.81

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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.