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Finding the Fourth Proportional to 78,054, 116,987.52 and 40,064.28

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Solution

The fourth proportional to 78,054, 116,987.52 and 40,064.28 is: 60,048.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,054 : 116,987.52 = 40,064.28 : x
  2. Step 2: Convert to fraction form
    78,054/116,987.52 = 40,064.28/x
  3. Step 3: Cross multiply
    78,054x = 116,987.52 × 40,064.28
  4. Step 4: Simplify right side
    78,054x = 4,687,020,757.79
  5. Step 5: Solve for x
    x = 4,687,020,757.79/78,054
  6. Step 6: Final answer
    x = 60,048.44

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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.