Home / 78,500.07-108,329.33-42,690.38

Finding the Fourth Proportional to 78,500.07, 108,329.33 and 42,690.38

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Solution

The fourth proportional to 78,500.07, 108,329.33 and 42,690.38 is: 58,912.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,500.07 : 108,329.33 = 42,690.38 : x
  2. Step 2: Convert to fraction form
    78,500.07/108,329.33 = 42,690.38/x
  3. Step 3: Cross multiply
    78,500.07x = 108,329.33 × 42,690.38
  4. Step 4: Simplify right side
    78,500.07x = 4,624,619,827.92
  5. Step 5: Solve for x
    x = 4,624,619,827.92/78,500.07
  6. Step 6: Final answer
    x = 58,912.30

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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.