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Finding the Fourth Proportional to 149,970.65, 225,012.80 and 90,040.98

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Solution

The fourth proportional to 149,970.65, 225,012.80 and 90,040.98 is: 135,095.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,970.65 : 225,012.80 = 90,040.98 : x
  2. Step 2: Convert to fraction form
    149,970.65/225,012.80 = 90,040.98/x
  3. Step 3: Cross multiply
    149,970.65x = 225,012.80 × 90,040.98
  4. Step 4: Simplify right side
    149,970.65x = 20,260,372,574.34
  5. Step 5: Solve for x
    x = 20,260,372,574.34/149,970.65
  6. Step 6: Final answer
    x = 135,095.59

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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.