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Finding the Fourth Proportional to 61,068.68, 91,611.72 and 18,952.40

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Solution

The fourth proportional to 61,068.68, 91,611.72 and 18,952.40 is: 28,431.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,068.68 : 91,611.72 = 18,952.40 : x
  2. Step 2: Convert to fraction form
    61,068.68/91,611.72 = 18,952.40/x
  3. Step 3: Cross multiply
    61,068.68x = 91,611.72 × 18,952.40
  4. Step 4: Simplify right side
    61,068.68x = 1,736,261,962.13
  5. Step 5: Solve for x
    x = 1,736,261,962.13/61,068.68
  6. Step 6: Final answer
    x = 28,431.30

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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.