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Finding the Fourth Proportional to 85,417.30, 128,087.55 and 32,809.30

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Solution

The fourth proportional to 85,417.30, 128,087.55 and 32,809.30 is: 49,199.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,417.30 : 128,087.55 = 32,809.30 : x
  2. Step 2: Convert to fraction form
    85,417.30/128,087.55 = 32,809.30/x
  3. Step 3: Cross multiply
    85,417.30x = 128,087.55 × 32,809.30
  4. Step 4: Simplify right side
    85,417.30x = 4,202,462,854.22
  5. Step 5: Solve for x
    x = 4,202,462,854.22/85,417.30
  6. Step 6: Final answer
    x = 49,199.20

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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.