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Finding the Fourth Proportional to 70,720.08, 106,128.72 and 45,749.40

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Solution

The fourth proportional to 70,720.08, 106,128.72 and 45,749.40 is: 68,655.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,720.08 : 106,128.72 = 45,749.40 : x
  2. Step 2: Convert to fraction form
    70,720.08/106,128.72 = 45,749.40/x
  3. Step 3: Cross multiply
    70,720.08x = 106,128.72 × 45,749.40
  4. Step 4: Simplify right side
    70,720.08x = 4,855,325,262.77
  5. Step 5: Solve for x
    x = 4,855,325,262.77/70,720.08
  6. Step 6: Final answer
    x = 68,655.54

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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.