Home / 81,420.15-112,359.64-45,123.92

Finding the Fourth Proportional to 81,420.15, 112,359.64 and 45,123.92

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Solution

The fourth proportional to 81,420.15, 112,359.64 and 45,123.92 is: 62,270.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,420.15 : 112,359.64 = 45,123.92 : x
  2. Step 2: Convert to fraction form
    81,420.15/112,359.64 = 45,123.92/x
  3. Step 3: Cross multiply
    81,420.15x = 112,359.64 × 45,123.92
  4. Step 4: Simplify right side
    81,420.15x = 5,070,106,619.17
  5. Step 5: Solve for x
    x = 5,070,106,619.17/81,420.15
  6. Step 6: Final answer
    x = 62,270.91

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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.