Home / 78,865.48-118,282.22-28,928.58

Finding the Fourth Proportional to 78,865.48, 118,282.22 and 28,928.58

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Solution

The fourth proportional to 78,865.48, 118,282.22 and 28,928.58 is: 43,387.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,865.48 : 118,282.22 = 28,928.58 : x
  2. Step 2: Convert to fraction form
    78,865.48/118,282.22 = 28,928.58/x
  3. Step 3: Cross multiply
    78,865.48x = 118,282.22 × 28,928.58
  4. Step 4: Simplify right side
    78,865.48x = 3,421,736,663.85
  5. Step 5: Solve for x
    x = 3,421,736,663.85/78,865.48
  6. Step 6: Final answer
    x = 43,387.00

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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.