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Finding the Fourth Proportional to 145,295.40, 217,943.09 and 45,456.45

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Solution

The fourth proportional to 145,295.40, 217,943.09 and 45,456.45 is: 68,184.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,295.40 : 217,943.09 = 45,456.45 : x
  2. Step 2: Convert to fraction form
    145,295.40/217,943.09 = 45,456.45/x
  3. Step 3: Cross multiply
    145,295.40x = 217,943.09 × 45,456.45
  4. Step 4: Simplify right side
    145,295.40x = 9,906,920,023.51
  5. Step 5: Solve for x
    x = 9,906,920,023.51/145,295.40
  6. Step 6: Final answer
    x = 68,184.68

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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.