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Finding the Fourth Proportional to 61,323.80, 91,985.70 and 19,207.40

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Solution

The fourth proportional to 61,323.80, 91,985.70 and 19,207.40 is: 28,811.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,323.80 : 91,985.70 = 19,207.40 : x
  2. Step 2: Convert to fraction form
    61,323.80/91,985.70 = 19,207.40/x
  3. Step 3: Cross multiply
    61,323.80x = 91,985.70 × 19,207.40
  4. Step 4: Simplify right side
    61,323.80x = 1,766,806,134.18
  5. Step 5: Solve for x
    x = 1,766,806,134.18/61,323.80
  6. Step 6: Final answer
    x = 28,811.10

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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.