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Finding the Fourth Proportional to 61,417.91, 84,768.32 and 38,458.40

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Solution

The fourth proportional to 61,417.91, 84,768.32 and 38,458.40 is: 53,079.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,417.91 : 84,768.32 = 38,458.40 : x
  2. Step 2: Convert to fraction form
    61,417.91/84,768.32 = 38,458.40/x
  3. Step 3: Cross multiply
    61,417.91x = 84,768.32 × 38,458.40
  4. Step 4: Simplify right side
    61,417.91x = 3,260,053,630.19
  5. Step 5: Solve for x
    x = 3,260,053,630.19/61,417.91
  6. Step 6: Final answer
    x = 53,079.85

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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.