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Finding the Fourth Proportional to 86,775.97, 130,015.36 and 47,360.74

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Solution

The fourth proportional to 86,775.97, 130,015.36 and 47,360.74 is: 70,960.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,775.97 : 130,015.36 = 47,360.74 : x
  2. Step 2: Convert to fraction form
    86,775.97/130,015.36 = 47,360.74/x
  3. Step 3: Cross multiply
    86,775.97x = 130,015.36 × 47,360.74
  4. Step 4: Simplify right side
    86,775.97x = 6,157,623,660.97
  5. Step 5: Solve for x
    x = 6,157,623,660.97/86,775.97
  6. Step 6: Final answer
    x = 70,960.01

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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.