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Finding the Fourth Proportional to 84,357.98, 126,495.66 and 28,178.81

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Solution

The fourth proportional to 84,357.98, 126,495.66 and 28,178.81 is: 42,254.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,357.98 : 126,495.66 = 28,178.81 : x
  2. Step 2: Convert to fraction form
    84,357.98/126,495.66 = 28,178.81/x
  3. Step 3: Cross multiply
    84,357.98x = 126,495.66 × 28,178.81
  4. Step 4: Simplify right side
    84,357.98x = 3,564,497,168.96
  5. Step 5: Solve for x
    x = 3,564,497,168.96/84,357.98
  6. Step 6: Final answer
    x = 42,254.42

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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.