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Finding the Fourth Proportional to 112,838.70, 155,710.21 and 61,842.42

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Solution

The fourth proportional to 112,838.70, 155,710.21 and 61,842.42 is: 85,338.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,838.70 : 155,710.21 = 61,842.42 : x
  2. Step 2: Convert to fraction form
    112,838.70/155,710.21 = 61,842.42/x
  3. Step 3: Cross multiply
    112,838.70x = 155,710.21 × 61,842.42
  4. Step 4: Simplify right side
    112,838.70x = 9,629,496,205.11
  5. Step 5: Solve for x
    x = 9,629,496,205.11/112,838.70
  6. Step 6: Final answer
    x = 85,338.60

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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.