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Finding the Fourth Proportional to 81,779,584.80, 122,565,178.80 and 43,459,456.80

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Solution

The fourth proportional to 81,779,584.80, 122,565,178.80 and 43,459,456.80 is: 65,133,811.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,779,584.80 : 122,565,178.80 = 43,459,456.80 : x
  2. Step 2: Convert to fraction form
    81,779,584.80/122,565,178.80 = 43,459,456.80/x
  3. Step 3: Cross multiply
    81,779,584.80x = 122,565,178.80 × 43,459,456.80
  4. Step 4: Simplify right side
    81,779,584.80x = 5,326,616,093,242,875
  5. Step 5: Solve for x
    x = 5,326,616,093,242,875/81,779,584.80
  6. Step 6: Final answer
    x = 65,133,811.90

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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.