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Finding the Fourth Proportional to 109,061.20, 163,687.80 and 64,632.40

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Solution

The fourth proportional to 109,061.20, 163,687.80 and 64,632.40 is: 97,005.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,061.20 : 163,687.80 = 64,632.40 : x
  2. Step 2: Convert to fraction form
    109,061.20/163,687.80 = 64,632.40/x
  3. Step 3: Cross multiply
    109,061.20x = 163,687.80 × 64,632.40
  4. Step 4: Simplify right side
    109,061.20x = 10,579,535,364.72
  5. Step 5: Solve for x
    x = 10,579,535,364.72/109,061.20
  6. Step 6: Final answer
    x = 97,005.49

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