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Finding the Fourth Proportional to 112,398.42, 155,108 and 61,410.05

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Solution

The fourth proportional to 112,398.42, 155,108 and 61,410.05 is: 84,744.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,398.42 : 155,108 = 61,410.05 : x
  2. Step 2: Convert to fraction form
    112,398.42/155,108 = 61,410.05/x
  3. Step 3: Cross multiply
    112,398.42x = 155,108 × 61,410.05
  4. Step 4: Simplify right side
    112,398.42x = 9,525,190,035.40
  5. Step 5: Solve for x
    x = 9,525,190,035.40/112,398.42
  6. Step 6: Final answer
    x = 84,744.88

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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.