Home / 78,099.12-107,776.85-42,289.16

Finding the Fourth Proportional to 78,099.12, 107,776.85 and 42,289.16

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Solution

The fourth proportional to 78,099.12, 107,776.85 and 42,289.16 is: 58,359.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,099.12 : 107,776.85 = 42,289.16 : x
  2. Step 2: Convert to fraction form
    78,099.12/107,776.85 = 42,289.16/x
  3. Step 3: Cross multiply
    78,099.12x = 107,776.85 × 42,289.16
  4. Step 4: Simplify right side
    78,099.12x = 4,557,791,703.62
  5. Step 5: Solve for x
    x = 4,557,791,703.62/78,099.12
  6. Step 6: Final answer
    x = 58,359.07

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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.