Home / 85,417.44-128,053.26-60,378.72

Finding the Fourth Proportional to 85,417.44, 128,053.26 and 60,378.72

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Solution

The fourth proportional to 85,417.44, 128,053.26 and 60,378.72 is: 90,516.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,417.44 : 128,053.26 = 60,378.72 : x
  2. Step 2: Convert to fraction form
    85,417.44/128,053.26 = 60,378.72/x
  3. Step 3: Cross multiply
    85,417.44x = 128,053.26 × 60,378.72
  4. Step 4: Simplify right side
    85,417.44x = 7,731,691,930.63
  5. Step 5: Solve for x
    x = 7,731,691,930.63/85,417.44
  6. Step 6: Final answer
    x = 90,516.55

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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.