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Finding the Fourth Proportional to 81,609.96, 112,622.58 and 45,312

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Solution

The fourth proportional to 81,609.96, 112,622.58 and 45,312 is: 62,531.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,609.96 : 112,622.58 = 45,312 : x
  2. Step 2: Convert to fraction form
    81,609.96/112,622.58 = 45,312/x
  3. Step 3: Cross multiply
    81,609.96x = 112,622.58 × 45,312
  4. Step 4: Simplify right side
    81,609.96x = 5,103,154,344.96
  5. Step 5: Solve for x
    x = 5,103,154,344.96/81,609.96
  6. Step 6: Final answer
    x = 62,531.02

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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.