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Finding the Fourth Proportional to 72,368.47, 108,555.74 and 19,777.80

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Solution

The fourth proportional to 72,368.47, 108,555.74 and 19,777.80 is: 29,667.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,368.47 : 108,555.74 = 19,777.80 : x
  2. Step 2: Convert to fraction form
    72,368.47/108,555.74 = 19,777.80/x
  3. Step 3: Cross multiply
    72,368.47x = 108,555.74 × 19,777.80
  4. Step 4: Simplify right side
    72,368.47x = 2,146,993,714.57
  5. Step 5: Solve for x
    x = 2,146,993,714.57/72,368.47
  6. Step 6: Final answer
    x = 29,667.53

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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.