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Finding the Fourth Proportional to 42,107.88, 63,108.93 and 21,053.79

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Solution

The fourth proportional to 42,107.88, 63,108.93 and 21,053.79 is: 31,554.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,107.88 : 63,108.93 = 21,053.79 : x
  2. Step 2: Convert to fraction form
    42,107.88/63,108.93 = 21,053.79/x
  3. Step 3: Cross multiply
    42,107.88x = 63,108.93 × 21,053.79
  4. Step 4: Simplify right side
    42,107.88x = 1,328,682,159.34
  5. Step 5: Solve for x
    x = 1,328,682,159.34/42,107.88
  6. Step 6: Final answer
    x = 31,554.24

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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.