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Finding the Fourth Proportional to 112,843.02, 155,661.54 and 71,931.18

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Solution

The fourth proportional to 112,843.02, 155,661.54 and 71,931.18 is: 99,225.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,843.02 : 155,661.54 = 71,931.18 : x
  2. Step 2: Convert to fraction form
    112,843.02/155,661.54 = 71,931.18/x
  3. Step 3: Cross multiply
    112,843.02x = 155,661.54 × 71,931.18
  4. Step 4: Simplify right side
    112,843.02x = 11,196,918,252.82
  5. Step 5: Solve for x
    x = 11,196,918,252.82/112,843.02
  6. Step 6: Final answer
    x = 99,225.62

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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.