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Finding the Fourth Proportional to 78,988.65, 118,479.33 and 19,823.01

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Solution

The fourth proportional to 78,988.65, 118,479.33 and 19,823.01 is: 29,733.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,988.65 : 118,479.33 = 19,823.01 : x
  2. Step 2: Convert to fraction form
    78,988.65/118,479.33 = 19,823.01/x
  3. Step 3: Cross multiply
    78,988.65x = 118,479.33 × 19,823.01
  4. Step 4: Simplify right side
    78,988.65x = 2,348,616,943.38
  5. Step 5: Solve for x
    x = 2,348,616,943.38/78,988.65
  6. Step 6: Final answer
    x = 29,733.60

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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.