Home / 81,038.47-111,699.24-54,171.18

Finding the Fourth Proportional to 81,038.47, 111,699.24 and 54,171.18

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Solution

The fourth proportional to 81,038.47, 111,699.24 and 54,171.18 is: 74,666.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,038.47 : 111,699.24 = 54,171.18 : x
  2. Step 2: Convert to fraction form
    81,038.47/111,699.24 = 54,171.18/x
  3. Step 3: Cross multiply
    81,038.47x = 111,699.24 × 54,171.18
  4. Step 4: Simplify right side
    81,038.47x = 6,050,879,635.90
  5. Step 5: Solve for x
    x = 6,050,879,635.90/81,038.47
  6. Step 6: Final answer
    x = 74,666.76

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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.