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Finding the Fourth Proportional to 158,586.02, 218,851.72 and 86,961.77

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Solution

The fourth proportional to 158,586.02, 218,851.72 and 86,961.77 is: 120,008.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,586.02 : 218,851.72 = 86,961.77 : x
  2. Step 2: Convert to fraction form
    158,586.02/218,851.72 = 86,961.77/x
  3. Step 3: Cross multiply
    158,586.02x = 218,851.72 × 86,961.77
  4. Step 4: Simplify right side
    158,586.02x = 19,031,732,503.94
  5. Step 5: Solve for x
    x = 19,031,732,503.94/158,586.02
  6. Step 6: Final answer
    x = 120,008.89

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1.5x scale

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.