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Finding the Fourth Proportional to 64,877.76, 89,516.03 and 39,383.51

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Solution

The fourth proportional to 64,877.76, 89,516.03 and 39,383.51 is: 54,339.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,877.76 : 89,516.03 = 39,383.51 : x
  2. Step 2: Convert to fraction form
    64,877.76/89,516.03 = 39,383.51/x
  3. Step 3: Cross multiply
    64,877.76x = 89,516.03 × 39,383.51
  4. Step 4: Simplify right side
    64,877.76x = 3,525,454,818.17
  5. Step 5: Solve for x
    x = 3,525,454,818.17/64,877.76
  6. Step 6: Final answer
    x = 54,339.96

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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.