Home / 117,374.40-161,867.52-78,543.36

Finding the Fourth Proportional to 117,374.40, 161,867.52 and 78,543.36

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Solution

The fourth proportional to 117,374.40, 161,867.52 and 78,543.36 is: 108,316.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,374.40 : 161,867.52 = 78,543.36 : x
  2. Step 2: Convert to fraction form
    117,374.40/161,867.52 = 78,543.36/x
  3. Step 3: Cross multiply
    117,374.40x = 161,867.52 × 78,543.36
  4. Step 4: Simplify right side
    117,374.40x = 12,713,618,895.67
  5. Step 5: Solve for x
    x = 12,713,618,895.67/117,374.40
  6. Step 6: Final answer
    x = 108,316.80

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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.