Home / 85,311.42-128,044.28-43,220.58

Finding the Fourth Proportional to 85,311.42, 128,044.28 and 43,220.58

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Solution

The fourth proportional to 85,311.42, 128,044.28 and 43,220.58 is: 64,869.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,311.42 : 128,044.28 = 43,220.58 : x
  2. Step 2: Convert to fraction form
    85,311.42/128,044.28 = 43,220.58/x
  3. Step 3: Cross multiply
    85,311.42x = 128,044.28 × 43,220.58
  4. Step 4: Simplify right side
    85,311.42x = 5,534,148,047.28
  5. Step 5: Solve for x
    x = 5,534,148,047.28/85,311.42
  6. Step 6: Final answer
    x = 64,869.96

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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.