Home / 78,668.02-108,561.57-42,857.92

Finding the Fourth Proportional to 78,668.02, 108,561.57 and 42,857.92

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Solution

The fourth proportional to 78,668.02, 108,561.57 and 42,857.92 is: 59,143.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,668.02 : 108,561.57 = 42,857.92 : x
  2. Step 2: Convert to fraction form
    78,668.02/108,561.57 = 42,857.92/x
  3. Step 3: Cross multiply
    78,668.02x = 108,561.57 × 42,857.92
  4. Step 4: Simplify right side
    78,668.02x = 4,652,723,082.13
  5. Step 5: Solve for x
    x = 4,652,723,082.13/78,668.02
  6. Step 6: Final answer
    x = 59,143.77

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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.