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Finding the Fourth Proportional to 111,312.99, 166,692.51 and 77,876.51

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Solution

The fourth proportional to 111,312.99, 166,692.51 and 77,876.51 is: 116,620.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,312.99 : 166,692.51 = 77,876.51 : x
  2. Step 2: Convert to fraction form
    111,312.99/166,692.51 = 77,876.51/x
  3. Step 3: Cross multiply
    111,312.99x = 166,692.51 × 77,876.51
  4. Step 4: Simplify right side
    111,312.99x = 12,981,430,088.48
  5. Step 5: Solve for x
    x = 12,981,430,088.48/111,312.99
  6. Step 6: Final answer
    x = 116,620.98

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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.