Home / 78,902.18-118,312.47-28,969.46

Finding the Fourth Proportional to 78,902.18, 118,312.47 and 28,969.46

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Solution

The fourth proportional to 78,902.18, 118,312.47 and 28,969.46 is: 43,439.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,902.18 : 118,312.47 = 28,969.46 : x
  2. Step 2: Convert to fraction form
    78,902.18/118,312.47 = 28,969.46/x
  3. Step 3: Cross multiply
    78,902.18x = 118,312.47 × 28,969.46
  4. Step 4: Simplify right side
    78,902.18x = 3,427,448,367.17
  5. Step 5: Solve for x
    x = 3,427,448,367.17/78,902.18
  6. Step 6: Final answer
    x = 43,439.21

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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.