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Finding the Fourth Proportional to 87,045.69, 120,148.69 and 56,835.71

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Solution

The fourth proportional to 87,045.69, 120,148.69 and 56,835.71 is: 78,450.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,045.69 : 120,148.69 = 56,835.71 : x
  2. Step 2: Convert to fraction form
    87,045.69/120,148.69 = 56,835.71/x
  3. Step 3: Cross multiply
    87,045.69x = 120,148.69 × 56,835.71
  4. Step 4: Simplify right side
    87,045.69x = 6,828,735,500.98
  5. Step 5: Solve for x
    x = 6,828,735,500.98/87,045.69
  6. Step 6: Final answer
    x = 78,450.01

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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.