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Finding the Fourth Proportional to 149,459.49, 206,248.01 and 81,474.98

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Solution

The fourth proportional to 149,459.49, 206,248.01 and 81,474.98 is: 112,432.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,459.49 : 206,248.01 = 81,474.98 : x
  2. Step 2: Convert to fraction form
    149,459.49/206,248.01 = 81,474.98/x
  3. Step 3: Cross multiply
    149,459.49x = 206,248.01 × 81,474.98
  4. Step 4: Simplify right side
    149,459.49x = 16,804,051,051.17
  5. Step 5: Solve for x
    x = 16,804,051,051.17/149,459.49
  6. Step 6: Final answer
    x = 112,432.14

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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.