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Finding the Fourth Proportional to 108,870.75, 150,230.12 and 61,129.47

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Solution

The fourth proportional to 108,870.75, 150,230.12 and 61,129.47 is: 84,352.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,870.75 : 150,230.12 = 61,129.47 : x
  2. Step 2: Convert to fraction form
    108,870.75/150,230.12 = 61,129.47/x
  3. Step 3: Cross multiply
    108,870.75x = 150,230.12 × 61,129.47
  4. Step 4: Simplify right side
    108,870.75x = 9,183,487,307.99
  5. Step 5: Solve for x
    x = 9,183,487,307.99/108,870.75
  6. Step 6: Final answer
    x = 84,352.20

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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.