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Finding the Fourth Proportional to 113,315.60, 169,627.80 and 66,429.20

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Solution

The fourth proportional to 113,315.60, 169,627.80 and 66,429.20 is: 99,441.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,315.60 : 169,627.80 = 66,429.20 : x
  2. Step 2: Convert to fraction form
    113,315.60/169,627.80 = 66,429.20/x
  3. Step 3: Cross multiply
    113,315.60x = 169,627.80 × 66,429.20
  4. Step 4: Simplify right side
    113,315.60x = 11,268,239,051.76
  5. Step 5: Solve for x
    x = 11,268,239,051.76/113,315.60
  6. Step 6: Final answer
    x = 99,441.20

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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.