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Finding the Fourth Proportional to 218,390,851.86, 301,386,813.03 and 129,159,286.80

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Solution

The fourth proportional to 218,390,851.86, 301,386,813.03 and 129,159,286.80 is: 178,244,214.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,390,851.86 : 301,386,813.03 = 129,159,286.80 : x
  2. Step 2: Convert to fraction form
    218,390,851.86/301,386,813.03 = 129,159,286.80/x
  3. Step 3: Cross multiply
    218,390,851.86x = 301,386,813.03 × 129,159,286.80
  4. Step 4: Simplify right side
    218,390,851.86x = 38,926,905,821,879,744
  5. Step 5: Solve for x
    x = 38,926,905,821,879,744/218,390,851.86
  6. Step 6: Final answer
    x = 178,244,214.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.