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Finding the Fourth Proportional to 112,159, 154,782.66 and 61,861.24

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Solution

The fourth proportional to 112,159, 154,782.66 and 61,861.24 is: 85,370.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,159 : 154,782.66 = 61,861.24 : x
  2. Step 2: Convert to fraction form
    112,159/154,782.66 = 61,861.24/x
  3. Step 3: Cross multiply
    112,159x = 154,782.66 × 61,861.24
  4. Step 4: Simplify right side
    112,159x = 9,575,047,278.10
  5. Step 5: Solve for x
    x = 9,575,047,278.10/112,159
  6. Step 6: Final answer
    x = 85,370.30

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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.