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Finding the Fourth Proportional to 109,643.50, 151,299.58 and 61,901.56

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Solution

The fourth proportional to 109,643.50, 151,299.58 and 61,901.56 is: 85,419.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,643.50 : 151,299.58 = 61,901.56 : x
  2. Step 2: Convert to fraction form
    109,643.50/151,299.58 = 61,901.56/x
  3. Step 3: Cross multiply
    109,643.50x = 151,299.58 × 61,901.56
  4. Step 4: Simplify right side
    109,643.50x = 9,365,678,963.34
  5. Step 5: Solve for x
    x = 9,365,678,963.34/109,643.50
  6. Step 6: Final answer
    x = 85,419.38

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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.