Home / 78,140.25-107,833.64-42,330.51

Finding the Fourth Proportional to 78,140.25, 107,833.64 and 42,330.51

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Solution

The fourth proportional to 78,140.25, 107,833.64 and 42,330.51 is: 58,416.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,140.25 : 107,833.64 = 42,330.51 : x
  2. Step 2: Convert to fraction form
    78,140.25/107,833.64 = 42,330.51/x
  3. Step 3: Cross multiply
    78,140.25x = 107,833.64 × 42,330.51
  4. Step 4: Simplify right side
    78,140.25x = 4,564,652,764.70
  5. Step 5: Solve for x
    x = 4,564,652,764.70/78,140.25
  6. Step 6: Final answer
    x = 58,416.15

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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.