Home / 78,730.14-108,647.01-42,920.04

Finding the Fourth Proportional to 78,730.14, 108,647.01 and 42,920.04

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Solution

The fourth proportional to 78,730.14, 108,647.01 and 42,920.04 is: 59,229.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,730.14 : 108,647.01 = 42,920.04 : x
  2. Step 2: Convert to fraction form
    78,730.14/108,647.01 = 42,920.04/x
  3. Step 3: Cross multiply
    78,730.14x = 108,647.01 × 42,920.04
  4. Step 4: Simplify right side
    78,730.14x = 4,663,134,015.08
  5. Step 5: Solve for x
    x = 4,663,134,015.08/78,730.14
  6. Step 6: Final answer
    x = 59,229.34

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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.