Home / 78,664.47-108,556.55-42,854.40

Finding the Fourth Proportional to 78,664.47, 108,556.55 and 42,854.40

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Solution

The fourth proportional to 78,664.47, 108,556.55 and 42,854.40 is: 59,138.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,664.47 : 108,556.55 = 42,854.40 : x
  2. Step 2: Convert to fraction form
    78,664.47/108,556.55 = 42,854.40/x
  3. Step 3: Cross multiply
    78,664.47x = 108,556.55 × 42,854.40
  4. Step 4: Simplify right side
    78,664.47x = 4,652,125,602.05
  5. Step 5: Solve for x
    x = 4,652,125,602.05/78,664.47
  6. Step 6: Final answer
    x = 59,138.84

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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.