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Finding the Fourth Proportional to 60,569.88, 90,828.90 and 21,115.32

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Solution

The fourth proportional to 60,569.88, 90,828.90 and 21,115.32 is: 31,663.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,569.88 : 90,828.90 = 21,115.32 : x
  2. Step 2: Convert to fraction form
    60,569.88/90,828.90 = 21,115.32/x
  3. Step 3: Cross multiply
    60,569.88x = 90,828.90 × 21,115.32
  4. Step 4: Simplify right side
    60,569.88x = 1,917,881,288.75
  5. Step 5: Solve for x
    x = 1,917,881,288.75/60,569.88
  6. Step 6: Final answer
    x = 31,663.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.