Home / 78,680.16-118,107.72-77,455.44

Finding the Fourth Proportional to 78,680.16, 118,107.72 and 77,455.44

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Solution

The fourth proportional to 78,680.16, 118,107.72 and 77,455.44 is: 116,269.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,680.16 : 118,107.72 = 77,455.44 : x
  2. Step 2: Convert to fraction form
    78,680.16/118,107.72 = 77,455.44/x
  3. Step 3: Cross multiply
    78,680.16x = 118,107.72 × 77,455.44
  4. Step 4: Simplify right side
    78,680.16x = 9,148,085,420.00
  5. Step 5: Solve for x
    x = 9,148,085,420.00/78,680.16
  6. Step 6: Final answer
    x = 116,269.28

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1.5x scale

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.