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Finding the Fourth Proportional to 218,663.40, 328,124.70 and 143,997.60

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Solution

The fourth proportional to 218,663.40, 328,124.70 and 143,997.60 is: 216,081.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,663.40 : 328,124.70 = 143,997.60 : x
  2. Step 2: Convert to fraction form
    218,663.40/328,124.70 = 143,997.60/x
  3. Step 3: Cross multiply
    218,663.40x = 328,124.70 × 143,997.60
  4. Step 4: Simplify right side
    218,663.40x = 47,249,169,300.72
  5. Step 5: Solve for x
    x = 47,249,169,300.72/218,663.40
  6. Step 6: Final answer
    x = 216,081.75

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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.