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Finding the Fourth Proportional to 112,651.92, 155,457.30 and 61,663.40

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Solution

The fourth proportional to 112,651.92, 155,457.30 and 61,663.40 is: 85,094.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,651.92 : 155,457.30 = 61,663.40 : x
  2. Step 2: Convert to fraction form
    112,651.92/155,457.30 = 61,663.40/x
  3. Step 3: Cross multiply
    112,651.92x = 155,457.30 × 61,663.40
  4. Step 4: Simplify right side
    112,651.92x = 9,586,025,672.82
  5. Step 5: Solve for x
    x = 9,586,025,672.82/112,651.92
  6. Step 6: Final answer
    x = 85,094.21

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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.