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Finding the Fourth Proportional to 85,687.74, 118,135.80 and 70,318.26

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Solution

The fourth proportional to 85,687.74, 118,135.80 and 70,318.26 is: 96,946.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,687.74 : 118,135.80 = 70,318.26 : x
  2. Step 2: Convert to fraction form
    85,687.74/118,135.80 = 70,318.26/x
  3. Step 3: Cross multiply
    85,687.74x = 118,135.80 × 70,318.26
  4. Step 4: Simplify right side
    85,687.74x = 8,307,103,899.71
  5. Step 5: Solve for x
    x = 8,307,103,899.71/85,687.74
  6. Step 6: Final answer
    x = 96,946.24

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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.