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Finding the Fourth Proportional to 115,699.34, 159,665.43 and 64,712.93

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Solution

The fourth proportional to 115,699.34, 159,665.43 and 64,712.93 is: 89,304.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,699.34 : 159,665.43 = 64,712.93 : x
  2. Step 2: Convert to fraction form
    115,699.34/159,665.43 = 64,712.93/x
  3. Step 3: Cross multiply
    115,699.34x = 159,665.43 × 64,712.93
  4. Step 4: Simplify right side
    115,699.34x = 10,332,416,875.35
  5. Step 5: Solve for x
    x = 10,332,416,875.35/115,699.34
  6. Step 6: Final answer
    x = 89,304.03

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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.