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Finding the Fourth Proportional to 112,843.64, 155,720.40 and 65,095.76

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Solution

The fourth proportional to 112,843.64, 155,720.40 and 65,095.76 is: 89,829.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,843.64 : 155,720.40 = 65,095.76 : x
  2. Step 2: Convert to fraction form
    112,843.64/155,720.40 = 65,095.76/x
  3. Step 3: Cross multiply
    112,843.64x = 155,720.40 × 65,095.76
  4. Step 4: Simplify right side
    112,843.64x = 10,136,737,785.50
  5. Step 5: Solve for x
    x = 10,136,737,785.50/112,843.64
  6. Step 6: Final answer
    x = 89,829.94

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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.