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Finding the Fourth Proportional to 74,908.80, 112,220.64 and 39,864.96

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Solution

The fourth proportional to 74,908.80, 112,220.64 and 39,864.96 is: 59,721.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,908.80 : 112,220.64 = 39,864.96 : x
  2. Step 2: Convert to fraction form
    74,908.80/112,220.64 = 39,864.96/x
  3. Step 3: Cross multiply
    74,908.80x = 112,220.64 × 39,864.96
  4. Step 4: Simplify right side
    74,908.80x = 4,473,671,324.77
  5. Step 5: Solve for x
    x = 4,473,671,324.77/74,908.80
  6. Step 6: Final answer
    x = 59,721.57

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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.