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Finding the Fourth Proportional to 85,448.40, 128,302.20 and 65,749.20

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Solution

The fourth proportional to 85,448.40, 128,302.20 and 65,749.20 is: 98,723.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,448.40 : 128,302.20 = 65,749.20 : x
  2. Step 2: Convert to fraction form
    85,448.40/128,302.20 = 65,749.20/x
  3. Step 3: Cross multiply
    85,448.40x = 128,302.20 × 65,749.20
  4. Step 4: Simplify right side
    85,448.40x = 8,435,767,008.24
  5. Step 5: Solve for x
    x = 8,435,767,008.24/85,448.40
  6. Step 6: Final answer
    x = 98,723.52

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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.