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Finding the Fourth Proportional to 61,669.55, 85,117.13 and 38,994.01

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Solution

The fourth proportional to 61,669.55, 85,117.13 and 38,994.01 is: 53,820.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,669.55 : 85,117.13 = 38,994.01 : x
  2. Step 2: Convert to fraction form
    61,669.55/85,117.13 = 38,994.01/x
  3. Step 3: Cross multiply
    61,669.55x = 85,117.13 × 38,994.01
  4. Step 4: Simplify right side
    61,669.55x = 3,319,057,956.86
  5. Step 5: Solve for x
    x = 3,319,057,956.86/61,669.55
  6. Step 6: Final answer
    x = 53,820.04

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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.