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Finding the Fourth Proportional to 70,211.04, 105,301.04 and 20,280.30

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Solution

The fourth proportional to 70,211.04, 105,301.04 and 20,280.30 is: 30,415.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,211.04 : 105,301.04 = 20,280.30 : x
  2. Step 2: Convert to fraction form
    70,211.04/105,301.04 = 20,280.30/x
  3. Step 3: Cross multiply
    70,211.04x = 105,301.04 × 20,280.30
  4. Step 4: Simplify right side
    70,211.04x = 2,135,536,681.51
  5. Step 5: Solve for x
    x = 2,135,536,681.51/70,211.04
  6. Step 6: Final answer
    x = 30,415.97

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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.