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Finding the Fourth Proportional to 72,438,814.80, 108,784,193.40 and 38,426,590.80

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Solution

The fourth proportional to 72,438,814.80, 108,784,193.40 and 38,426,590.80 is: 57,706,710.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,438,814.80 : 108,784,193.40 = 38,426,590.80 : x
  2. Step 2: Convert to fraction form
    72,438,814.80/108,784,193.40 = 38,426,590.80/x
  3. Step 3: Cross multiply
    72,438,814.80x = 108,784,193.40 × 38,426,590.80
  4. Step 4: Simplify right side
    72,438,814.80x = 4,180,205,685,289,860.50
  5. Step 5: Solve for x
    x = 4,180,205,685,289,860.50/72,438,814.80
  6. Step 6: Final answer
    x = 57,706,710.10

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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.