Home / 85,394.05-128,120.74-38,042.76

Finding the Fourth Proportional to 85,394.05, 128,120.74 and 38,042.76

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Solution

The fourth proportional to 85,394.05, 128,120.74 and 38,042.76 is: 57,077.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,394.05 : 128,120.74 = 38,042.76 : x
  2. Step 2: Convert to fraction form
    85,394.05/128,120.74 = 38,042.76/x
  3. Step 3: Cross multiply
    85,394.05x = 128,120.74 × 38,042.76
  4. Step 4: Simplify right side
    85,394.05x = 4,874,066,948.19
  5. Step 5: Solve for x
    x = 4,874,066,948.19/85,394.05
  6. Step 6: Final answer
    x = 57,077.36

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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.