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Finding the Fourth Proportional to 85,486.79, 128,151.72 and 32,856.64

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Solution

The fourth proportional to 85,486.79, 128,151.72 and 32,856.64 is: 49,254.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,486.79 : 128,151.72 = 32,856.64 : x
  2. Step 2: Convert to fraction form
    85,486.79/128,151.72 = 32,856.64/x
  3. Step 3: Cross multiply
    85,486.79x = 128,151.72 × 32,856.64
  4. Step 4: Simplify right side
    85,486.79x = 4,210,634,609.04
  5. Step 5: Solve for x
    x = 4,210,634,609.04/85,486.79
  6. Step 6: Final answer
    x = 49,254.80

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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.