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Finding the Fourth Proportional to 158,355, 218,530.17 and 85,758.66

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Solution

The fourth proportional to 158,355, 218,530.17 and 85,758.66 is: 118,347.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,355 : 218,530.17 = 85,758.66 : x
  2. Step 2: Convert to fraction form
    158,355/218,530.17 = 85,758.66/x
  3. Step 3: Cross multiply
    158,355x = 218,530.17 × 85,758.66
  4. Step 4: Simplify right side
    158,355x = 18,740,854,548.77
  5. Step 5: Solve for x
    x = 18,740,854,548.77/158,355
  6. Step 6: Final answer
    x = 118,347.10

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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.