Home / 78,828.80-108,784.56-43,018.40

Finding the Fourth Proportional to 78,828.80, 108,784.56 and 43,018.40

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Solution

The fourth proportional to 78,828.80, 108,784.56 and 43,018.40 is: 59,365.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,828.80 : 108,784.56 = 43,018.40 : x
  2. Step 2: Convert to fraction form
    78,828.80/108,784.56 = 43,018.40/x
  3. Step 3: Cross multiply
    78,828.80x = 108,784.56 × 43,018.40
  4. Step 4: Simplify right side
    78,828.80x = 4,679,737,715.90
  5. Step 5: Solve for x
    x = 4,679,737,715.90/78,828.80
  6. Step 6: Final answer
    x = 59,365.84

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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.