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Finding the Fourth Proportional to 137,858.88, 190,244.48 and 77,430.44

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Solution

The fourth proportional to 137,858.88, 190,244.48 and 77,430.44 is: 106,853.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,858.88 : 190,244.48 = 77,430.44 : x
  2. Step 2: Convert to fraction form
    137,858.88/190,244.48 = 77,430.44/x
  3. Step 3: Cross multiply
    137,858.88x = 190,244.48 × 77,430.44
  4. Step 4: Simplify right side
    137,858.88x = 14,730,713,793.97
  5. Step 5: Solve for x
    x = 14,730,713,793.97/137,858.88
  6. Step 6: Final answer
    x = 106,853.57

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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.