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Finding the Fourth Proportional to 145,605.85, 218,335.70 and 84,835.79

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Solution

The fourth proportional to 145,605.85, 218,335.70 and 84,835.79 is: 127,211.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,605.85 : 218,335.70 = 84,835.79 : x
  2. Step 2: Convert to fraction form
    145,605.85/218,335.70 = 84,835.79/x
  3. Step 3: Cross multiply
    145,605.85x = 218,335.70 × 84,835.79
  4. Step 4: Simplify right side
    145,605.85x = 18,522,681,716.36
  5. Step 5: Solve for x
    x = 18,522,681,716.36/145,605.85
  6. Step 6: Final answer
    x = 127,211.11

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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.