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Finding the Fourth Proportional to 72,672.30, 109,008.45 and 68,784.30

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Solution

The fourth proportional to 72,672.30, 109,008.45 and 68,784.30 is: 103,176.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,672.30 : 109,008.45 = 68,784.30 : x
  2. Step 2: Convert to fraction form
    72,672.30/109,008.45 = 68,784.30/x
  3. Step 3: Cross multiply
    72,672.30x = 109,008.45 × 68,784.30
  4. Step 4: Simplify right side
    72,672.30x = 7,498,069,927.34
  5. Step 5: Solve for x
    x = 7,498,069,927.34/72,672.30
  6. Step 6: Final answer
    x = 103,176.45

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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.