Home / 78,820.90-118,231.35-28,904.38

Finding the Fourth Proportional to 78,820.90, 118,231.35 and 28,904.38

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Solution

The fourth proportional to 78,820.90, 118,231.35 and 28,904.38 is: 43,356.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,820.90 : 118,231.35 = 28,904.38 : x
  2. Step 2: Convert to fraction form
    78,820.90/118,231.35 = 28,904.38/x
  3. Step 3: Cross multiply
    78,820.90x = 118,231.35 × 28,904.38
  4. Step 4: Simplify right side
    78,820.90x = 3,417,403,868.31
  5. Step 5: Solve for x
    x = 3,417,403,868.31/78,820.90
  6. Step 6: Final answer
    x = 43,356.57

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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.