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Finding the Fourth Proportional to 115,805, 159,810.90 and 62,813

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Solution

The fourth proportional to 115,805, 159,810.90 and 62,813 is: 86,681.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,805 : 159,810.90 = 62,813 : x
  2. Step 2: Convert to fraction form
    115,805/159,810.90 = 62,813/x
  3. Step 3: Cross multiply
    115,805x = 159,810.90 × 62,813
  4. Step 4: Simplify right side
    115,805x = 10,038,202,061.70
  5. Step 5: Solve for x
    x = 10,038,202,061.70/115,805
  6. Step 6: Final answer
    x = 86,681.94

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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.