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Finding the Fourth Proportional to 145,156,989.80, 217,735,484.70 and 145,156,989.80

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Solution

The fourth proportional to 145,156,989.80, 217,735,484.70 and 145,156,989.80 is: 217,735,484.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,156,989.80 : 217,735,484.70 = 145,156,989.80 : x
  2. Step 2: Convert to fraction form
    145,156,989.80/217,735,484.70 = 145,156,989.80/x
  3. Step 3: Cross multiply
    145,156,989.80x = 217,735,484.70 × 145,156,989.80
  4. Step 4: Simplify right side
    145,156,989.80x = 31,605,827,531,695,956
  5. Step 5: Solve for x
    x = 31,605,827,531,695,956/145,156,989.80
  6. Step 6: Final answer
    x = 217,735,484.70

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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.