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Finding the Fourth Proportional to 70,271.19, 105,390.36 and 20,337.93

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Solution

The fourth proportional to 70,271.19, 105,390.36 and 20,337.93 is: 30,502.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,271.19 : 105,390.36 = 20,337.93 : x
  2. Step 2: Convert to fraction form
    70,271.19/105,390.36 = 20,337.93/x
  3. Step 3: Cross multiply
    70,271.19x = 105,390.36 × 20,337.93
  4. Step 4: Simplify right side
    70,271.19x = 2,143,421,764.35
  5. Step 5: Solve for x
    x = 2,143,421,764.35/70,271.19
  6. Step 6: Final answer
    x = 30,502.14

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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.