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Finding the Fourth Proportional to 145,007.66, 217,597.59 and 78,446.31

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Solution

The fourth proportional to 145,007.66, 217,597.59 and 78,446.31 is: 117,716.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,007.66 : 217,597.59 = 78,446.31 : x
  2. Step 2: Convert to fraction form
    145,007.66/217,597.59 = 78,446.31/x
  3. Step 3: Cross multiply
    145,007.66x = 217,597.59 × 78,446.31
  4. Step 4: Simplify right side
    145,007.66x = 17,069,728,000.39
  5. Step 5: Solve for x
    x = 17,069,728,000.39/145,007.66
  6. Step 6: Final answer
    x = 117,716.05

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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.