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Finding the Fourth Proportional to 84,007.80, 125,838.90 and 57,742.20

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Solution

The fourth proportional to 84,007.80, 125,838.90 and 57,742.20 is: 86,494.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,007.80 : 125,838.90 = 57,742.20 : x
  2. Step 2: Convert to fraction form
    84,007.80/125,838.90 = 57,742.20/x
  3. Step 3: Cross multiply
    84,007.80x = 125,838.90 × 57,742.20
  4. Step 4: Simplify right side
    84,007.80x = 7,266,214,931.58
  5. Step 5: Solve for x
    x = 7,266,214,931.58/84,007.80
  6. Step 6: Final answer
    x = 86,494.53

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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.