Home / 78,380.19-108,165.65-42,570.81

Finding the Fourth Proportional to 78,380.19, 108,165.65 and 42,570.81

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Solution

The fourth proportional to 78,380.19, 108,165.65 and 42,570.81 is: 58,748.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,380.19 : 108,165.65 = 42,570.81 : x
  2. Step 2: Convert to fraction form
    78,380.19/108,165.65 = 42,570.81/x
  3. Step 3: Cross multiply
    78,380.19x = 108,165.65 × 42,570.81
  4. Step 4: Simplify right side
    78,380.19x = 4,604,699,121.82
  5. Step 5: Solve for x
    x = 4,604,699,121.82/78,380.19
  6. Step 6: Final answer
    x = 58,748.25

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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.