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Finding the Fourth Proportional to 72,214.22, 99,653.76 and 39,948

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Solution

The fourth proportional to 72,214.22, 99,653.76 and 39,948 is: 55,127.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,214.22 : 99,653.76 = 39,948 : x
  2. Step 2: Convert to fraction form
    72,214.22/99,653.76 = 39,948/x
  3. Step 3: Cross multiply
    72,214.22x = 99,653.76 × 39,948
  4. Step 4: Simplify right side
    72,214.22x = 3,980,968,204.74
  5. Step 5: Solve for x
    x = 3,980,968,204.74/72,214.22
  6. Step 6: Final answer
    x = 55,127.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.