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Finding the Fourth Proportional to 112,774.52, 155,628.80 and 61,790.50

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Solution

The fourth proportional to 112,774.52, 155,628.80 and 61,790.50 is: 85,270.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,774.52 : 155,628.80 = 61,790.50 : x
  2. Step 2: Convert to fraction form
    112,774.52/155,628.80 = 61,790.50/x
  3. Step 3: Cross multiply
    112,774.52x = 155,628.80 × 61,790.50
  4. Step 4: Simplify right side
    112,774.52x = 9,616,381,366.40
  5. Step 5: Solve for x
    x = 9,616,381,366.40/112,774.52
  6. Step 6: Final answer
    x = 85,270.87

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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.