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Finding the Fourth Proportional to 105,063.40, 144,804.90 and 90,133.48

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Solution

The fourth proportional to 105,063.40, 144,804.90 and 90,133.48 is: 124,227.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,063.40 : 144,804.90 = 90,133.48 : x
  2. Step 2: Convert to fraction form
    105,063.40/144,804.90 = 90,133.48/x
  3. Step 3: Cross multiply
    105,063.40x = 144,804.90 × 90,133.48
  4. Step 4: Simplify right side
    105,063.40x = 13,051,769,558.05
  5. Step 5: Solve for x
    x = 13,051,769,558.05/105,063.40
  6. Step 6: Final answer
    x = 124,227.56

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1.5x scale

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.