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Finding the Fourth Proportional to 266,465,923.20, 399,698,884.80 and 72,401,384.70

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Solution

The fourth proportional to 266,465,923.20, 399,698,884.80 and 72,401,384.70 is: 108,602,077.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,465,923.20 : 399,698,884.80 = 72,401,384.70 : x
  2. Step 2: Convert to fraction form
    266,465,923.20/399,698,884.80 = 72,401,384.70/x
  3. Step 3: Cross multiply
    266,465,923.20x = 399,698,884.80 × 72,401,384.70
  4. Step 4: Simplify right side
    266,465,923.20x = 28,938,752,722,565,784
  5. Step 5: Solve for x
    x = 28,938,752,722,565,784/266,465,923.20
  6. Step 6: Final answer
    x = 108,602,077.05

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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.