Home / 78,039.64-107,694.99-42,229.65

Finding the Fourth Proportional to 78,039.64, 107,694.99 and 42,229.65

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Solution

The fourth proportional to 78,039.64, 107,694.99 and 42,229.65 is: 58,277.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,039.64 : 107,694.99 = 42,229.65 : x
  2. Step 2: Convert to fraction form
    78,039.64/107,694.99 = 42,229.65/x
  3. Step 3: Cross multiply
    78,039.64x = 107,694.99 × 42,229.65
  4. Step 4: Simplify right side
    78,039.64x = 4,547,921,840.03
  5. Step 5: Solve for x
    x = 4,547,921,840.03/78,039.64
  6. Step 6: Final answer
    x = 58,277.07

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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.