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Finding the Fourth Proportional to 45,619.40, 68,404.80 and 19,294.40

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Solution

The fourth proportional to 45,619.40, 68,404.80 and 19,294.40 is: 28,931.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,619.40 : 68,404.80 = 19,294.40 : x
  2. Step 2: Convert to fraction form
    45,619.40/68,404.80 = 19,294.40/x
  3. Step 3: Cross multiply
    45,619.40x = 68,404.80 × 19,294.40
  4. Step 4: Simplify right side
    45,619.40x = 1,319,829,573.12
  5. Step 5: Solve for x
    x = 1,319,829,573.12/45,619.40
  6. Step 6: Final answer
    x = 28,931.32

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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.