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Finding the Fourth Proportional to 145,186.83, 217,740.96 and 39,980.79

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Solution

The fourth proportional to 145,186.83, 217,740.96 and 39,980.79 is: 59,960.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,186.83 : 217,740.96 = 39,980.79 : x
  2. Step 2: Convert to fraction form
    145,186.83/217,740.96 = 39,980.79/x
  3. Step 3: Cross multiply
    145,186.83x = 217,740.96 × 39,980.79
  4. Step 4: Simplify right side
    145,186.83x = 8,705,455,596.16
  5. Step 5: Solve for x
    x = 8,705,455,596.16/145,186.83
  6. Step 6: Final answer
    x = 59,960.37

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1.5x scale

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.