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Finding the Fourth Proportional to 44,345.40, 66,518.10 and 19,721.40

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Solution

The fourth proportional to 44,345.40, 66,518.10 and 19,721.40 is: 29,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    44,345.40 : 66,518.10 = 19,721.40 : x
  2. Step 2: Convert to fraction form
    44,345.40/66,518.10 = 19,721.40/x
  3. Step 3: Cross multiply
    44,345.40x = 66,518.10 × 19,721.40
  4. Step 4: Simplify right side
    44,345.40x = 1,311,830,057.34
  5. Step 5: Solve for x
    x = 1,311,830,057.34/44,345.40
  6. Step 6: Final answer
    x = 29,582.10

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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.