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Finding the Fourth Proportional to 139,164,461.70, 208,746,692.55 and 84,744,903.30

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Solution

The fourth proportional to 139,164,461.70, 208,746,692.55 and 84,744,903.30 is: 127,117,354.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,164,461.70 : 208,746,692.55 = 84,744,903.30 : x
  2. Step 2: Convert to fraction form
    139,164,461.70/208,746,692.55 = 84,744,903.30/x
  3. Step 3: Cross multiply
    139,164,461.70x = 208,746,692.55 × 84,744,903.30
  4. Step 4: Simplify right side
    139,164,461.70x = 17,690,218,274,344,580
  5. Step 5: Solve for x
    x = 17,690,218,274,344,580/139,164,461.70
  6. Step 6: Final answer
    x = 127,117,354.95

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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.