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Finding the Fourth Proportional to 85,655.94, 128,449.86 and 33,031.86

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Solution

The fourth proportional to 85,655.94, 128,449.86 and 33,031.86 is: 49,534.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,655.94 : 128,449.86 = 33,031.86 : x
  2. Step 2: Convert to fraction form
    85,655.94/128,449.86 = 33,031.86/x
  3. Step 3: Cross multiply
    85,655.94x = 128,449.86 × 33,031.86
  4. Step 4: Simplify right side
    85,655.94x = 4,242,937,792.54
  5. Step 5: Solve for x
    x = 4,242,937,792.54/85,655.94
  6. Step 6: Final answer
    x = 49,534.66

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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.