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Finding the Fourth Proportional to 112,873.60, 169,700.80 and 105,564.80

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Solution

The fourth proportional to 112,873.60, 169,700.80 and 105,564.80 is: 158,712.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,873.60 : 169,700.80 = 105,564.80 : x
  2. Step 2: Convert to fraction form
    112,873.60/169,700.80 = 105,564.80/x
  3. Step 3: Cross multiply
    112,873.60x = 169,700.80 × 105,564.80
  4. Step 4: Simplify right side
    112,873.60x = 17,914,431,011.84
  5. Step 5: Solve for x
    x = 17,914,431,011.84/112,873.60
  6. Step 6: Final answer
    x = 158,712.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.