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Finding the Fourth Proportional to 158,048.48, 218,110.69 and 90,064

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Solution

The fourth proportional to 158,048.48, 218,110.69 and 90,064 is: 124,290.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,048.48 : 218,110.69 = 90,064 : x
  2. Step 2: Convert to fraction form
    158,048.48/218,110.69 = 90,064/x
  3. Step 3: Cross multiply
    158,048.48x = 218,110.69 × 90,064
  4. Step 4: Simplify right side
    158,048.48x = 19,643,921,184.16
  5. Step 5: Solve for x
    x = 19,643,921,184.16/158,048.48
  6. Step 6: Final answer
    x = 124,290.48

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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.