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Finding the Fourth Proportional to 124,444.19, 171,747.78 and 78,570.47

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Solution

The fourth proportional to 124,444.19, 171,747.78 and 78,570.47 is: 108,436.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,444.19 : 171,747.78 = 78,570.47 : x
  2. Step 2: Convert to fraction form
    124,444.19/171,747.78 = 78,570.47/x
  3. Step 3: Cross multiply
    124,444.19x = 171,747.78 × 78,570.47
  4. Step 4: Simplify right side
    124,444.19x = 13,494,303,796.06
  5. Step 5: Solve for x
    x = 13,494,303,796.06/124,444.19
  6. Step 6: Final answer
    x = 108,436.59

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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.