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Finding the Fourth Proportional to 70,553.49, 105,803.55 and 28,419.27

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Solution

The fourth proportional to 70,553.49, 105,803.55 and 28,419.27 is: 42,618.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,553.49 : 105,803.55 = 28,419.27 : x
  2. Step 2: Convert to fraction form
    70,553.49/105,803.55 = 28,419.27/x
  3. Step 3: Cross multiply
    70,553.49x = 105,803.55 × 28,419.27
  4. Step 4: Simplify right side
    70,553.49x = 3,006,859,654.41
  5. Step 5: Solve for x
    x = 3,006,859,654.41/70,553.49
  6. Step 6: Final answer
    x = 42,618.16

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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.