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Finding the Fourth Proportional to 145,605.75, 218,375.75 and 56,813.55

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Solution

The fourth proportional to 145,605.75, 218,375.75 and 56,813.55 is: 85,207.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,605.75 : 218,375.75 = 56,813.55 : x
  2. Step 2: Convert to fraction form
    145,605.75/218,375.75 = 56,813.55/x
  3. Step 3: Cross multiply
    145,605.75x = 218,375.75 × 56,813.55
  4. Step 4: Simplify right side
    145,605.75x = 12,406,701,823.32
  5. Step 5: Solve for x
    x = 12,406,701,823.32/145,605.75
  6. Step 6: Final answer
    x = 85,207.50

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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.