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Finding the Fourth Proportional to 112,125.37, 154,731.03 and 61,138.50

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Solution

The fourth proportional to 112,125.37, 154,731.03 and 61,138.50 is: 84,370.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,125.37 : 154,731.03 = 61,138.50 : x
  2. Step 2: Convert to fraction form
    112,125.37/154,731.03 = 61,138.50/x
  3. Step 3: Cross multiply
    112,125.37x = 154,731.03 × 61,138.50
  4. Step 4: Simplify right side
    112,125.37x = 9,460,023,077.66
  5. Step 5: Solve for x
    x = 9,460,023,077.66/112,125.37
  6. Step 6: Final answer
    x = 84,370.05

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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.