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Finding the Fourth Proportional to 91,578.40, 137,302.80 and 35,396.80

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Solution

The fourth proportional to 91,578.40, 137,302.80 and 35,396.80 is: 53,070.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,578.40 : 137,302.80 = 35,396.80 : x
  2. Step 2: Convert to fraction form
    91,578.40/137,302.80 = 35,396.80/x
  3. Step 3: Cross multiply
    91,578.40x = 137,302.80 × 35,396.80
  4. Step 4: Simplify right side
    91,578.40x = 4,860,079,751.04
  5. Step 5: Solve for x
    x = 4,860,079,751.04/91,578.40
  6. Step 6: Final answer
    x = 53,070.15

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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.