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Finding the Fourth Proportional to 65,888.02, 90,904.03 and 42,022.38

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Solution

The fourth proportional to 65,888.02, 90,904.03 and 42,022.38 is: 57,977.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,888.02 : 90,904.03 = 42,022.38 : x
  2. Step 2: Convert to fraction form
    65,888.02/90,904.03 = 42,022.38/x
  3. Step 3: Cross multiply
    65,888.02x = 90,904.03 × 42,022.38
  4. Step 4: Simplify right side
    65,888.02x = 3,820,003,692.19
  5. Step 5: Solve for x
    x = 3,820,003,692.19/65,888.02
  6. Step 6: Final answer
    x = 57,977.21

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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.