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Finding the Fourth Proportional to 147,561.60, 221,318.64 and 42,356.64

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Solution

The fourth proportional to 147,561.60, 221,318.64 and 42,356.64 is: 63,528.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,561.60 : 221,318.64 = 42,356.64 : x
  2. Step 2: Convert to fraction form
    147,561.60/221,318.64 = 42,356.64/x
  3. Step 3: Cross multiply
    147,561.60x = 221,318.64 × 42,356.64
  4. Step 4: Simplify right side
    147,561.60x = 9,374,313,959.77
  5. Step 5: Solve for x
    x = 9,374,313,959.77/147,561.60
  6. Step 6: Final answer
    x = 63,528.14

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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.