Home / 81,693,001.20-122,539,501.80-72,764,792.40

Finding the Fourth Proportional to 81,693,001.20, 122,539,501.80 and 72,764,792.40

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Solution

The fourth proportional to 81,693,001.20, 122,539,501.80 and 72,764,792.40 is: 109,147,188.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,693,001.20 : 122,539,501.80 = 72,764,792.40 : x
  2. Step 2: Convert to fraction form
    81,693,001.20/122,539,501.80 = 72,764,792.40/x
  3. Step 3: Cross multiply
    81,693,001.20x = 122,539,501.80 × 72,764,792.40
  4. Step 4: Simplify right side
    81,693,001.20x = 8,916,561,409,276,427
  5. Step 5: Solve for x
    x = 8,916,561,409,276,427/81,693,001.20
  6. Step 6: Final answer
    x = 109,147,188.60

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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.