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Finding the Fourth Proportional to 112,881.99, 155,778.66 and 61,894.60

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Solution

The fourth proportional to 112,881.99, 155,778.66 and 61,894.60 is: 85,415.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,881.99 : 155,778.66 = 61,894.60 : x
  2. Step 2: Convert to fraction form
    112,881.99/155,778.66 = 61,894.60/x
  3. Step 3: Cross multiply
    112,881.99x = 155,778.66 × 61,894.60
  4. Step 4: Simplify right side
    112,881.99x = 9,641,857,459.79
  5. Step 5: Solve for x
    x = 9,641,857,459.79/112,881.99
  6. Step 6: Final answer
    x = 85,415.37

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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.