Home / 76,970.10-115,455.15-72,012.90

Finding the Fourth Proportional to 76,970.10, 115,455.15 and 72,012.90

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Solution

The fourth proportional to 76,970.10, 115,455.15 and 72,012.90 is: 108,019.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,970.10 : 115,455.15 = 72,012.90 : x
  2. Step 2: Convert to fraction form
    76,970.10/115,455.15 = 72,012.90/x
  3. Step 3: Cross multiply
    76,970.10x = 115,455.15 × 72,012.90
  4. Step 4: Simplify right side
    76,970.10x = 8,314,260,171.44
  5. Step 5: Solve for x
    x = 8,314,260,171.44/76,970.10
  6. Step 6: Final answer
    x = 108,019.35

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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.