Home / 106,468.40-159,370.36-78,420.12

Finding the Fourth Proportional to 106,468.40, 159,370.36 and 78,420.12

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Solution

The fourth proportional to 106,468.40, 159,370.36 and 78,420.12 is: 117,385.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,468.40 : 159,370.36 = 78,420.12 : x
  2. Step 2: Convert to fraction form
    106,468.40/159,370.36 = 78,420.12/x
  3. Step 3: Cross multiply
    106,468.40x = 159,370.36 × 78,420.12
  4. Step 4: Simplify right side
    106,468.40x = 12,497,842,755.64
  5. Step 5: Solve for x
    x = 12,497,842,755.64/106,468.40
  6. Step 6: Final answer
    x = 117,385.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.