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Finding the Fourth Proportional to 230,428.80, 345,643.20 and 72,673.20

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Solution

The fourth proportional to 230,428.80, 345,643.20 and 72,673.20 is: 109,009.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,428.80 : 345,643.20 = 72,673.20 : x
  2. Step 2: Convert to fraction form
    230,428.80/345,643.20 = 72,673.20/x
  3. Step 3: Cross multiply
    230,428.80x = 345,643.20 × 72,673.20
  4. Step 4: Simplify right side
    230,428.80x = 25,118,997,402.24
  5. Step 5: Solve for x
    x = 25,118,997,402.24/230,428.80
  6. Step 6: Final answer
    x = 109,009.80

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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.