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Finding the Fourth Proportional to 86,076.39, 128,875.08 and 43,865.46

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Solution

The fourth proportional to 86,076.39, 128,875.08 and 43,865.46 is: 65,676.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,076.39 : 128,875.08 = 43,865.46 : x
  2. Step 2: Convert to fraction form
    86,076.39/128,875.08 = 43,865.46/x
  3. Step 3: Cross multiply
    86,076.39x = 128,875.08 × 43,865.46
  4. Step 4: Simplify right side
    86,076.39x = 5,653,164,666.74
  5. Step 5: Solve for x
    x = 5,653,164,666.74/86,076.39
  6. Step 6: Final answer
    x = 65,676.14

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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.