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Finding the Fourth Proportional to 72,719.61, 109,034.73 and 28,294.56

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Solution

The fourth proportional to 72,719.61, 109,034.73 and 28,294.56 is: 42,424.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,719.61 : 109,034.73 = 28,294.56 : x
  2. Step 2: Convert to fraction form
    72,719.61/109,034.73 = 28,294.56/x
  3. Step 3: Cross multiply
    72,719.61x = 109,034.73 × 28,294.56
  4. Step 4: Simplify right side
    72,719.61x = 3,085,089,710.07
  5. Step 5: Solve for x
    x = 3,085,089,710.07/72,719.61
  6. Step 6: Final answer
    x = 42,424.45

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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.