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Finding the Fourth Proportional to 74,830.29, 103,239.75 and 47,987.60

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Solution

The fourth proportional to 74,830.29, 103,239.75 and 47,987.60 is: 66,206.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,830.29 : 103,239.75 = 47,987.60 : x
  2. Step 2: Convert to fraction form
    74,830.29/103,239.75 = 47,987.60/x
  3. Step 3: Cross multiply
    74,830.29x = 103,239.75 × 47,987.60
  4. Step 4: Simplify right side
    74,830.29x = 4,954,227,587.16
  5. Step 5: Solve for x
    x = 4,954,227,587.16/74,830.29
  6. Step 6: Final answer
    x = 66,206.18

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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.