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Finding the Fourth Proportional to 112,216, 154,858.08 and 61,915

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Solution

The fourth proportional to 112,216, 154,858.08 and 61,915 is: 85,442.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,216 : 154,858.08 = 61,915 : x
  2. Step 2: Convert to fraction form
    112,216/154,858.08 = 61,915/x
  3. Step 3: Cross multiply
    112,216x = 154,858.08 × 61,915
  4. Step 4: Simplify right side
    112,216x = 9,588,038,023.20
  5. Step 5: Solve for x
    x = 9,588,038,023.20/112,216
  6. Step 6: Final answer
    x = 85,442.70

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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.