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Finding the Fourth Proportional to 73,955, 102,058.86 and 40,421.72

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Solution

The fourth proportional to 73,955, 102,058.86 and 40,421.72 is: 55,782.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,955 : 102,058.86 = 40,421.72 : x
  2. Step 2: Convert to fraction form
    73,955/102,058.86 = 40,421.72/x
  3. Step 3: Cross multiply
    73,955x = 102,058.86 × 40,421.72
  4. Step 4: Simplify right side
    73,955x = 4,125,394,662.44
  5. Step 5: Solve for x
    x = 4,125,394,662.44/73,955
  6. Step 6: Final answer
    x = 55,782.50

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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.