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Finding the Fourth Proportional to 90,579.74, 135,898.31 and 70,657.54

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Solution

The fourth proportional to 90,579.74, 135,898.31 and 70,657.54 is: 106,008.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,579.74 : 135,898.31 = 70,657.54 : x
  2. Step 2: Convert to fraction form
    90,579.74/135,898.31 = 70,657.54/x
  3. Step 3: Cross multiply
    90,579.74x = 135,898.31 × 70,657.54
  4. Step 4: Simplify right side
    90,579.74x = 9,602,240,111.66
  5. Step 5: Solve for x
    x = 9,602,240,111.66/90,579.74
  6. Step 6: Final answer
    x = 106,008.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.