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Finding the Fourth Proportional to 42,763.80, 64,145.70 and 42,034.80

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Solution

The fourth proportional to 42,763.80, 64,145.70 and 42,034.80 is: 63,052.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,763.80 : 64,145.70 = 42,034.80 : x
  2. Step 2: Convert to fraction form
    42,763.80/64,145.70 = 42,034.80/x
  3. Step 3: Cross multiply
    42,763.80x = 64,145.70 × 42,034.80
  4. Step 4: Simplify right side
    42,763.80x = 2,696,351,670.36
  5. Step 5: Solve for x
    x = 2,696,351,670.36/42,763.80
  6. Step 6: Final answer
    x = 63,052.20

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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.