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Finding the Fourth Proportional to 78,545.71, 117,621.73 and 61,995.59

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Solution

The fourth proportional to 78,545.71, 117,621.73 and 61,995.59 is: 92,838.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,545.71 : 117,621.73 = 61,995.59 : x
  2. Step 2: Convert to fraction form
    78,545.71/117,621.73 = 61,995.59/x
  3. Step 3: Cross multiply
    78,545.71x = 117,621.73 × 61,995.59
  4. Step 4: Simplify right side
    78,545.71x = 7,292,028,478.64
  5. Step 5: Solve for x
    x = 7,292,028,478.64/78,545.71
  6. Step 6: Final answer
    x = 92,838.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.