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Finding the Fourth Proportional to 52,170.99, 78,081.53 and 42,810.63

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Solution

The fourth proportional to 52,170.99, 78,081.53 and 42,810.63 is: 64,072.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,170.99 : 78,081.53 = 42,810.63 : x
  2. Step 2: Convert to fraction form
    52,170.99/78,081.53 = 42,810.63/x
  3. Step 3: Cross multiply
    52,170.99x = 78,081.53 × 42,810.63
  4. Step 4: Simplify right side
    52,170.99x = 3,342,719,276.61
  5. Step 5: Solve for x
    x = 3,342,719,276.61/52,170.99
  6. Step 6: Final answer
    x = 64,072.38

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1.5x scale

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.