Home / 78,663.48-108,555.17-42,853.40

Finding the Fourth Proportional to 78,663.48, 108,555.17 and 42,853.40

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Solution

The fourth proportional to 78,663.48, 108,555.17 and 42,853.40 is: 59,137.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,663.48 : 108,555.17 = 42,853.40 : x
  2. Step 2: Convert to fraction form
    78,663.48/108,555.17 = 42,853.40/x
  3. Step 3: Cross multiply
    78,663.48x = 108,555.17 × 42,853.40
  4. Step 4: Simplify right side
    78,663.48x = 4,651,958,122.08
  5. Step 5: Solve for x
    x = 4,651,958,122.08/78,663.48
  6. Step 6: Final answer
    x = 59,137.46

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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.