Home / 99,861,465.60-149,792,198.40-81,721,612.80

Finding the Fourth Proportional to 99,861,465.60, 149,792,198.40 and 81,721,612.80

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Solution

The fourth proportional to 99,861,465.60, 149,792,198.40 and 81,721,612.80 is: 122,582,419.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,861,465.60 : 149,792,198.40 = 81,721,612.80 : x
  2. Step 2: Convert to fraction form
    99,861,465.60/149,792,198.40 = 81,721,612.80/x
  3. Step 3: Cross multiply
    99,861,465.60x = 149,792,198.40 × 81,721,612.80
  4. Step 4: Simplify right side
    99,861,465.60x = 12,241,260,038,105,580
  5. Step 5: Solve for x
    x = 12,241,260,038,105,580/99,861,465.60
  6. Step 6: Final answer
    x = 122,582,419.20

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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.