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Finding the Fourth Proportional to 70,127.40, 105,158.70 and 30,664.20

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Solution

The fourth proportional to 70,127.40, 105,158.70 and 30,664.20 is: 45,982.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,127.40 : 105,158.70 = 30,664.20 : x
  2. Step 2: Convert to fraction form
    70,127.40/105,158.70 = 30,664.20/x
  3. Step 3: Cross multiply
    70,127.40x = 105,158.70 × 30,664.20
  4. Step 4: Simplify right side
    70,127.40x = 3,224,607,408.54
  5. Step 5: Solve for x
    x = 3,224,607,408.54/70,127.40
  6. Step 6: Final answer
    x = 45,982.13

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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.