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Finding the Fourth Proportional to 117,221.58, 161,802.61 and 74,780.11

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Solution

The fourth proportional to 117,221.58, 161,802.61 and 74,780.11 is: 103,220.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,221.58 : 161,802.61 = 74,780.11 : x
  2. Step 2: Convert to fraction form
    117,221.58/161,802.61 = 74,780.11/x
  3. Step 3: Cross multiply
    117,221.58x = 161,802.61 × 74,780.11
  4. Step 4: Simplify right side
    117,221.58x = 12,099,617,410.03
  5. Step 5: Solve for x
    x = 12,099,617,410.03/117,221.58
  6. Step 6: Final answer
    x = 103,220.05

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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.