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Finding the Fourth Proportional to 73,900.40, 101,990.68 and 42,064.16

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Solution

The fourth proportional to 73,900.40, 101,990.68 and 42,064.16 is: 58,053.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,900.40 : 101,990.68 = 42,064.16 : x
  2. Step 2: Convert to fraction form
    73,900.40/101,990.68 = 42,064.16/x
  3. Step 3: Cross multiply
    73,900.40x = 101,990.68 × 42,064.16
  4. Step 4: Simplify right side
    73,900.40x = 4,290,151,666.92
  5. Step 5: Solve for x
    x = 4,290,151,666.92/73,900.40
  6. Step 6: Final answer
    x = 58,053.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.