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Finding the Fourth Proportional to 38,402,405.80, 57,669,963.90 and 20,486,501.80

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Solution

The fourth proportional to 38,402,405.80, 57,669,963.90 and 20,486,501.80 is: 30,765,151.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,402,405.80 : 57,669,963.90 = 20,486,501.80 : x
  2. Step 2: Convert to fraction form
    38,402,405.80/57,669,963.90 = 20,486,501.80/x
  3. Step 3: Cross multiply
    38,402,405.80x = 57,669,963.90 × 20,486,501.80
  4. Step 4: Simplify right side
    38,402,405.80x = 1,181,455,819,243,285
  5. Step 5: Solve for x
    x = 1,181,455,819,243,285/38,402,405.80
  6. Step 6: Final answer
    x = 30,765,151.16

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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.