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Finding the Fourth Proportional to 67,642.98, 93,341.10 and 38,955

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Solution

The fourth proportional to 67,642.98, 93,341.10 and 38,955 is: 53,754.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,642.98 : 93,341.10 = 38,955 : x
  2. Step 2: Convert to fraction form
    67,642.98/93,341.10 = 38,955/x
  3. Step 3: Cross multiply
    67,642.98x = 93,341.10 × 38,955
  4. Step 4: Simplify right side
    67,642.98x = 3,636,102,550.50
  5. Step 5: Solve for x
    x = 3,636,102,550.50/67,642.98
  6. Step 6: Final answer
    x = 53,754.32

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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.