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Finding the Fourth Proportional to 112,906.48, 155,813.08 and 61,915.98

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Solution

The fourth proportional to 112,906.48, 155,813.08 and 61,915.98 is: 85,445.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,906.48 : 155,813.08 = 61,915.98 : x
  2. Step 2: Convert to fraction form
    112,906.48/155,813.08 = 61,915.98/x
  3. Step 3: Cross multiply
    112,906.48x = 155,813.08 × 61,915.98
  4. Step 4: Simplify right side
    112,906.48x = 9,647,319,545.02
  5. Step 5: Solve for x
    x = 9,647,319,545.02/112,906.48
  6. Step 6: Final answer
    x = 85,445.22

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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.