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Finding the Fourth Proportional to 85,335.88, 128,114.70 and 65,628.40

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Solution

The fourth proportional to 85,335.88, 128,114.70 and 65,628.40 is: 98,527.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,335.88 : 128,114.70 = 65,628.40 : x
  2. Step 2: Convert to fraction form
    85,335.88/128,114.70 = 65,628.40/x
  3. Step 3: Cross multiply
    85,335.88x = 128,114.70 × 65,628.40
  4. Step 4: Simplify right side
    85,335.88x = 8,407,962,777.48
  5. Step 5: Solve for x
    x = 8,407,962,777.48/85,335.88
  6. Step 6: Final answer
    x = 98,527.87

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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.