Home / 28,107,136.80-42,160,705.20-21,721,971.60

Finding the Fourth Proportional to 28,107,136.80, 42,160,705.20 and 21,721,971.60

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Solution

The fourth proportional to 28,107,136.80, 42,160,705.20 and 21,721,971.60 is: 32,582,957.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107,136.80 : 42,160,705.20 = 21,721,971.60 : x
  2. Step 2: Convert to fraction form
    28,107,136.80/42,160,705.20 = 21,721,971.60/x
  3. Step 3: Cross multiply
    28,107,136.80x = 42,160,705.20 × 21,721,971.60
  4. Step 4: Simplify right side
    28,107,136.80x = 915,813,640,990,372.50
  5. Step 5: Solve for x
    x = 915,813,640,990,372.50/28,107,136.80
  6. Step 6: Final answer
    x = 32,582,957.40

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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.