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Finding the Fourth Proportional to 103,935.53, 143,427.53 and 65,715.65

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Solution

The fourth proportional to 103,935.53, 143,427.53 and 65,715.65 is: 90,685.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,935.53 : 143,427.53 = 65,715.65 : x
  2. Step 2: Convert to fraction form
    103,935.53/143,427.53 = 65,715.65/x
  3. Step 3: Cross multiply
    103,935.53x = 143,427.53 × 65,715.65
  4. Step 4: Simplify right side
    103,935.53x = 9,425,432,644.71
  5. Step 5: Solve for x
    x = 9,425,432,644.71/103,935.53
  6. Step 6: Final answer
    x = 90,685.38

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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.