Home / 82,749.60-124,126.08-20,420.64

Finding the Fourth Proportional to 82,749.60, 124,126.08 and 20,420.64

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Solution

The fourth proportional to 82,749.60, 124,126.08 and 20,420.64 is: 30,631.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,749.60 : 124,126.08 = 20,420.64 : x
  2. Step 2: Convert to fraction form
    82,749.60/124,126.08 = 20,420.64/x
  3. Step 3: Cross multiply
    82,749.60x = 124,126.08 × 20,420.64
  4. Step 4: Simplify right side
    82,749.60x = 2,534,733,994.29
  5. Step 5: Solve for x
    x = 2,534,733,994.29/82,749.60
  6. Step 6: Final answer
    x = 30,631.37

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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.