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Finding the Fourth Proportional to 53,402.80, 79,931.40 and 49,255.60

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Solution

The fourth proportional to 53,402.80, 79,931.40 and 49,255.60 is: 73,724.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,402.80 : 79,931.40 = 49,255.60 : x
  2. Step 2: Convert to fraction form
    53,402.80/79,931.40 = 49,255.60/x
  3. Step 3: Cross multiply
    53,402.80x = 79,931.40 × 49,255.60
  4. Step 4: Simplify right side
    53,402.80x = 3,937,069,065.84
  5. Step 5: Solve for x
    x = 3,937,069,065.84/53,402.80
  6. Step 6: Final answer
    x = 73,724.02

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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.