Home / 78,079.04-107,749.11-42,269.05

Finding the Fourth Proportional to 78,079.04, 107,749.11 and 42,269.05

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Solution

The fourth proportional to 78,079.04, 107,749.11 and 42,269.05 is: 58,331.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,079.04 : 107,749.11 = 42,269.05 : x
  2. Step 2: Convert to fraction form
    78,079.04/107,749.11 = 42,269.05/x
  3. Step 3: Cross multiply
    78,079.04x = 107,749.11 × 42,269.05
  4. Step 4: Simplify right side
    78,079.04x = 4,554,452,518.05
  5. Step 5: Solve for x
    x = 4,554,452,518.05/78,079.04
  6. Step 6: Final answer
    x = 58,331.31

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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.