Home / 78,511.68-108,343.02-42,701.64

Finding the Fourth Proportional to 78,511.68, 108,343.02 and 42,701.64

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Solution

The fourth proportional to 78,511.68, 108,343.02 and 42,701.64 is: 58,926.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,511.68 : 108,343.02 = 42,701.64 : x
  2. Step 2: Convert to fraction form
    78,511.68/108,343.02 = 42,701.64/x
  3. Step 3: Cross multiply
    78,511.68x = 108,343.02 × 42,701.64
  4. Step 4: Simplify right side
    78,511.68x = 4,626,424,636.55
  5. Step 5: Solve for x
    x = 4,626,424,636.55/78,511.68
  6. Step 6: Final answer
    x = 58,926.58

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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.