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Finding the Fourth Proportional to 268,352.19, 402,515.53 and 78,804.90

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Solution

The fourth proportional to 268,352.19, 402,515.53 and 78,804.90 is: 118,203.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,352.19 : 402,515.53 = 78,804.90 : x
  2. Step 2: Convert to fraction form
    268,352.19/402,515.53 = 78,804.90/x
  3. Step 3: Cross multiply
    268,352.19x = 402,515.53 × 78,804.90
  4. Step 4: Simplify right side
    268,352.19x = 31,720,195,893.08
  5. Step 5: Solve for x
    x = 31,720,195,893.08/268,352.19
  6. Step 6: Final answer
    x = 118,203.60

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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.