Home / 78,723.30-108,637.45-42,913.30

Finding the Fourth Proportional to 78,723.30, 108,637.45 and 42,913.30

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Solution

The fourth proportional to 78,723.30, 108,637.45 and 42,913.30 is: 59,219.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,723.30 : 108,637.45 = 42,913.30 : x
  2. Step 2: Convert to fraction form
    78,723.30/108,637.45 = 42,913.30/x
  3. Step 3: Cross multiply
    78,723.30x = 108,637.45 × 42,913.30
  4. Step 4: Simplify right side
    78,723.30x = 4,661,991,483.09
  5. Step 5: Solve for x
    x = 4,661,991,483.09/78,723.30
  6. Step 6: Final answer
    x = 59,219.97

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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.