Home / 78,628.14-108,508.80-42,820.14

Finding the Fourth Proportional to 78,628.14, 108,508.80 and 42,820.14

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Solution

The fourth proportional to 78,628.14, 108,508.80 and 42,820.14 is: 59,092.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,628.14 : 108,508.80 = 42,820.14 : x
  2. Step 2: Convert to fraction form
    78,628.14/108,508.80 = 42,820.14/x
  3. Step 3: Cross multiply
    78,628.14x = 108,508.80 × 42,820.14
  4. Step 4: Simplify right side
    78,628.14x = 4,646,362,007.23
  5. Step 5: Solve for x
    x = 4,646,362,007.23/78,628.14
  6. Step 6: Final answer
    x = 59,092.86

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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.