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Finding the Fourth Proportional to 76,420.40, 114,533.40 and 68,061.20

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Solution

The fourth proportional to 76,420.40, 114,533.40 and 68,061.20 is: 102,005.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,420.40 : 114,533.40 = 68,061.20 : x
  2. Step 2: Convert to fraction form
    76,420.40/114,533.40 = 68,061.20/x
  3. Step 3: Cross multiply
    76,420.40x = 114,533.40 × 68,061.20
  4. Step 4: Simplify right side
    76,420.40x = 7,795,280,644.08
  5. Step 5: Solve for x
    x = 7,795,280,644.08/76,420.40
  6. Step 6: Final answer
    x = 102,005.23

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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.