Home / 129,327.63-178,488.53-72,749.94

Finding the Fourth Proportional to 129,327.63, 178,488.53 and 72,749.94

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Solution

The fourth proportional to 129,327.63, 178,488.53 and 72,749.94 is: 100,404.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,327.63 : 178,488.53 = 72,749.94 : x
  2. Step 2: Convert to fraction form
    129,327.63/178,488.53 = 72,749.94/x
  3. Step 3: Cross multiply
    129,327.63x = 178,488.53 × 72,749.94
  4. Step 4: Simplify right side
    129,327.63x = 12,985,029,848.19
  5. Step 5: Solve for x
    x = 12,985,029,848.19/129,327.63
  6. Step 6: Final answer
    x = 100,404.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.