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Finding the Fourth Proportional to 112,673.60, 155,489.59 and 61,689.57

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Solution

The fourth proportional to 112,673.60, 155,489.59 and 61,689.57 is: 85,131.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,673.60 : 155,489.59 = 61,689.57 : x
  2. Step 2: Convert to fraction form
    112,673.60/155,489.59 = 61,689.57/x
  3. Step 3: Cross multiply
    112,673.60x = 155,489.59 × 61,689.57
  4. Step 4: Simplify right side
    112,673.60x = 9,592,085,440.60
  5. Step 5: Solve for x
    x = 9,592,085,440.60/112,673.60
  6. Step 6: Final answer
    x = 85,131.62

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1.5x scale

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.