Home / 85,439.34-128,290.50-76,166.46

Finding the Fourth Proportional to 85,439.34, 128,290.50 and 76,166.46

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Solution

The fourth proportional to 85,439.34, 128,290.50 and 76,166.46 is: 114,366.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,439.34 : 128,290.50 = 76,166.46 : x
  2. Step 2: Convert to fraction form
    85,439.34/128,290.50 = 76,166.46/x
  3. Step 3: Cross multiply
    85,439.34x = 128,290.50 × 76,166.46
  4. Step 4: Simplify right side
    85,439.34x = 9,771,433,236.63
  5. Step 5: Solve for x
    x = 9,771,433,236.63/85,439.34
  6. Step 6: Final answer
    x = 114,366.91

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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.