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Finding the Fourth Proportional to 115,807.50, 159,814.36 and 62,815.50

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Solution

The fourth proportional to 115,807.50, 159,814.36 and 62,815.50 is: 86,685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,807.50 : 159,814.36 = 62,815.50 : x
  2. Step 2: Convert to fraction form
    115,807.50/159,814.36 = 62,815.50/x
  3. Step 3: Cross multiply
    115,807.50x = 159,814.36 × 62,815.50
  4. Step 4: Simplify right side
    115,807.50x = 10,038,818,930.58
  5. Step 5: Solve for x
    x = 10,038,818,930.58/115,807.50
  6. Step 6: Final answer
    x = 86,685.40

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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.