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Finding the Fourth Proportional to 115,124.80, 158,872.08 and 64,824.16

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Solution

The fourth proportional to 115,124.80, 158,872.08 and 64,824.16 is: 89,457.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,124.80 : 158,872.08 = 64,824.16 : x
  2. Step 2: Convert to fraction form
    115,124.80/158,872.08 = 64,824.16/x
  3. Step 3: Cross multiply
    115,124.80x = 158,872.08 × 64,824.16
  4. Step 4: Simplify right side
    115,124.80x = 10,298,749,133.45
  5. Step 5: Solve for x
    x = 10,298,749,133.45/115,124.80
  6. Step 6: Final answer
    x = 89,457.26

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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.