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Finding the Fourth Proportional to 78,488.54, 108,599.42 and 68,437.93

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Solution

The fourth proportional to 78,488.54, 108,599.42 and 68,437.93 is: 94,693.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,488.54 : 108,599.42 = 68,437.93 : x
  2. Step 2: Convert to fraction form
    78,488.54/108,599.42 = 68,437.93/x
  3. Step 3: Cross multiply
    78,488.54x = 108,599.42 × 68,437.93
  4. Step 4: Simplify right side
    78,488.54x = 7,432,319,403.60
  5. Step 5: Solve for x
    x = 7,432,319,403.60/78,488.54
  6. Step 6: Final answer
    x = 94,693.05

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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.