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Finding the Fourth Proportional to 61,369.68, 84,663.72 and 38,690.76

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Solution

The fourth proportional to 61,369.68, 84,663.72 and 38,690.76 is: 53,376.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,369.68 : 84,663.72 = 38,690.76 : x
  2. Step 2: Convert to fraction form
    61,369.68/84,663.72 = 38,690.76/x
  3. Step 3: Cross multiply
    61,369.68x = 84,663.72 × 38,690.76
  4. Step 4: Simplify right side
    61,369.68x = 3,275,703,671.23
  5. Step 5: Solve for x
    x = 3,275,703,671.23/61,369.68
  6. Step 6: Final answer
    x = 53,376.58

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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.