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Finding the Fourth Proportional to 72,692,171.70, 109,038,257.55 and 69,822,390.30

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Solution

The fourth proportional to 72,692,171.70, 109,038,257.55 and 69,822,390.30 is: 104,733,585.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,692,171.70 : 109,038,257.55 = 69,822,390.30 : x
  2. Step 2: Convert to fraction form
    72,692,171.70/109,038,257.55 = 69,822,390.30/x
  3. Step 3: Cross multiply
    72,692,171.70x = 109,038,257.55 × 69,822,390.30
  4. Step 4: Simplify right side
    72,692,171.70x = 7,613,311,776,288,021
  5. Step 5: Solve for x
    x = 7,613,311,776,288,021/72,692,171.70
  6. Step 6: Final answer
    x = 104,733,585.45

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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.