Home / 78,098.12-107,775.60-42,288.56

Finding the Fourth Proportional to 78,098.12, 107,775.60 and 42,288.56

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Solution

The fourth proportional to 78,098.12, 107,775.60 and 42,288.56 is: 58,358.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,098.12 : 107,775.60 = 42,288.56 : x
  2. Step 2: Convert to fraction form
    78,098.12/107,775.60 = 42,288.56/x
  3. Step 3: Cross multiply
    78,098.12x = 107,775.60 × 42,288.56
  4. Step 4: Simplify right side
    78,098.12x = 4,557,674,927.14
  5. Step 5: Solve for x
    x = 4,557,674,927.14/78,098.12
  6. Step 6: Final answer
    x = 58,358.32

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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.