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Finding the Fourth Proportional to 111,608.16, 154,026.80 and 61,307.68

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Solution

The fourth proportional to 111,608.16, 154,026.80 and 61,307.68 is: 84,608.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,608.16 : 154,026.80 = 61,307.68 : x
  2. Step 2: Convert to fraction form
    111,608.16/154,026.80 = 61,307.68/x
  3. Step 3: Cross multiply
    111,608.16x = 154,026.80 × 61,307.68
  4. Step 4: Simplify right side
    111,608.16x = 9,443,025,765.82
  5. Step 5: Solve for x
    x = 9,443,025,765.82/111,608.16
  6. Step 6: Final answer
    x = 84,608.74

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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.