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Finding the Fourth Proportional to 105,112.40, 145,058.50 and 59,789.22

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Solution

The fourth proportional to 105,112.40, 145,058.50 and 59,789.22 is: 82,511.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,112.40 : 145,058.50 = 59,789.22 : x
  2. Step 2: Convert to fraction form
    105,112.40/145,058.50 = 59,789.22/x
  3. Step 3: Cross multiply
    105,112.40x = 145,058.50 × 59,789.22
  4. Step 4: Simplify right side
    105,112.40x = 8,672,934,462.97
  5. Step 5: Solve for x
    x = 8,672,934,462.97/105,112.40
  6. Step 6: Final answer
    x = 82,511.05

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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.