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Finding the Fourth Proportional to 65,617.17, 90,528 and 42,969.08

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Solution

The fourth proportional to 65,617.17, 90,528 and 42,969.08 is: 59,281.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,617.17 : 90,528 = 42,969.08 : x
  2. Step 2: Convert to fraction form
    65,617.17/90,528 = 42,969.08/x
  3. Step 3: Cross multiply
    65,617.17x = 90,528 × 42,969.08
  4. Step 4: Simplify right side
    65,617.17x = 3,889,904,421.60
  5. Step 5: Solve for x
    x = 3,889,904,421.60/65,617.17
  6. Step 6: Final answer
    x = 59,281.81

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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.