Home / 28,107,146.80-42,160,720.20-21,721,981.60

Finding the Fourth Proportional to 28,107,146.80, 42,160,720.20 and 21,721,981.60

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Solution

The fourth proportional to 28,107,146.80, 42,160,720.20 and 21,721,981.60 is: 32,582,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107,146.80 : 42,160,720.20 = 21,721,981.60 : x
  2. Step 2: Convert to fraction form
    28,107,146.80/42,160,720.20 = 21,721,981.60/x
  3. Step 3: Cross multiply
    28,107,146.80x = 42,160,720.20 × 21,721,981.60
  4. Step 4: Simplify right side
    28,107,146.80x = 915,814,388,427,148.50
  5. Step 5: Solve for x
    x = 915,814,388,427,148.50/28,107,146.80
  6. Step 6: Final answer
    x = 32,582,972.40

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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.