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Finding the Fourth Proportional to 45,717.80, 68,547.10 and 19,415.40

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Solution

The fourth proportional to 45,717.80, 68,547.10 and 19,415.40 is: 29,110.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,717.80 : 68,547.10 = 19,415.40 : x
  2. Step 2: Convert to fraction form
    45,717.80/68,547.10 = 19,415.40/x
  3. Step 3: Cross multiply
    45,717.80x = 68,547.10 × 19,415.40
  4. Step 4: Simplify right side
    45,717.80x = 1,330,869,365.34
  5. Step 5: Solve for x
    x = 1,330,869,365.34/45,717.80
  6. Step 6: Final answer
    x = 29,110.53

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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.