Home / 85,428.64-128,087.76-35,543.12

Finding the Fourth Proportional to 85,428.64, 128,087.76 and 35,543.12

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Solution

The fourth proportional to 85,428.64, 128,087.76 and 35,543.12 is: 53,291.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,428.64 : 128,087.76 = 35,543.12 : x
  2. Step 2: Convert to fraction form
    85,428.64/128,087.76 = 35,543.12/x
  3. Step 3: Cross multiply
    85,428.64x = 128,087.76 × 35,543.12
  4. Step 4: Simplify right side
    85,428.64x = 4,552,638,624.21
  5. Step 5: Solve for x
    x = 4,552,638,624.21/85,428.64
  6. Step 6: Final answer
    x = 53,291.71

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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.