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Finding the Fourth Proportional to 61,388.36, 84,754.88 and 42,039.66

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Solution

The fourth proportional to 61,388.36, 84,754.88 and 42,039.66 is: 58,041.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,388.36 : 84,754.88 = 42,039.66 : x
  2. Step 2: Convert to fraction form
    61,388.36/84,754.88 = 42,039.66/x
  3. Step 3: Cross multiply
    61,388.36x = 84,754.88 × 42,039.66
  4. Step 4: Simplify right side
    61,388.36x = 3,563,066,338.54
  5. Step 5: Solve for x
    x = 3,563,066,338.54/61,388.36
  6. Step 6: Final answer
    x = 58,041.40

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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.