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Finding the Fourth Proportional to 61,196,381.70, 91,794,572.55 and 20,806,865.70

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Solution

The fourth proportional to 61,196,381.70, 91,794,572.55 and 20,806,865.70 is: 31,210,298.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,196,381.70 : 91,794,572.55 = 20,806,865.70 : x
  2. Step 2: Convert to fraction form
    61,196,381.70/91,794,572.55 = 20,806,865.70/x
  3. Step 3: Cross multiply
    61,196,381.70x = 91,794,572.55 × 20,806,865.70
  4. Step 4: Simplify right side
    61,196,381.70x = 1,909,957,343,036,756.50
  5. Step 5: Solve for x
    x = 1,909,957,343,036,756.50/61,196,381.70
  6. Step 6: Final answer
    x = 31,210,298.55

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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.