Home / 86,415.53-130,090.13-77,725.61

Finding the Fourth Proportional to 86,415.53, 130,090.13 and 77,725.61

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Solution

The fourth proportional to 86,415.53, 130,090.13 and 77,725.61 is: 117,008.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,415.53 : 130,090.13 = 77,725.61 : x
  2. Step 2: Convert to fraction form
    86,415.53/130,090.13 = 77,725.61/x
  3. Step 3: Cross multiply
    86,415.53x = 130,090.13 × 77,725.61
  4. Step 4: Simplify right side
    86,415.53x = 10,111,334,058.78
  5. Step 5: Solve for x
    x = 10,111,334,058.78/86,415.53
  6. Step 6: Final answer
    x = 117,008.30

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.