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Finding the Fourth Proportional to 81,420.19, 112,359.86 and 45,610.19

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Solution

The fourth proportional to 81,420.19, 112,359.86 and 45,610.19 is: 62,942.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,420.19 : 112,359.86 = 45,610.19 : x
  2. Step 2: Convert to fraction form
    81,420.19/112,359.86 = 45,610.19/x
  3. Step 3: Cross multiply
    81,420.19x = 112,359.86 × 45,610.19
  4. Step 4: Simplify right side
    81,420.19x = 5,124,754,365.51
  5. Step 5: Solve for x
    x = 5,124,754,365.51/81,420.19
  6. Step 6: Final answer
    x = 62,942.06

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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.