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Finding the Fourth Proportional to 87,368.78, 120,488.94 and 64,764.07

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Solution

The fourth proportional to 87,368.78, 120,488.94 and 64,764.07 is: 89,315.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,368.78 : 120,488.94 = 64,764.07 : x
  2. Step 2: Convert to fraction form
    87,368.78/120,488.94 = 64,764.07/x
  3. Step 3: Cross multiply
    87,368.78x = 120,488.94 × 64,764.07
  4. Step 4: Simplify right side
    87,368.78x = 7,803,353,843.16
  5. Step 5: Solve for x
    x = 7,803,353,843.16/87,368.78
  6. Step 6: Final answer
    x = 89,315.13

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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.