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Finding the Fourth Proportional to 72,009.60, 108,014.40 and 19,424.40

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Solution

The fourth proportional to 72,009.60, 108,014.40 and 19,424.40 is: 29,136.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,009.60 : 108,014.40 = 19,424.40 : x
  2. Step 2: Convert to fraction form
    72,009.60/108,014.40 = 19,424.40/x
  3. Step 3: Cross multiply
    72,009.60x = 108,014.40 × 19,424.40
  4. Step 4: Simplify right side
    72,009.60x = 2,098,114,911.36
  5. Step 5: Solve for x
    x = 2,098,114,911.36/72,009.60
  6. Step 6: Final answer
    x = 29,136.60

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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.