Home / 86,957.81-130,261.07-72,878.12

Finding the Fourth Proportional to 86,957.81, 130,261.07 and 72,878.12

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Solution

The fourth proportional to 86,957.81, 130,261.07 and 72,878.12 is: 109,169.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,957.81 : 130,261.07 = 72,878.12 : x
  2. Step 2: Convert to fraction form
    86,957.81/130,261.07 = 72,878.12/x
  3. Step 3: Cross multiply
    86,957.81x = 130,261.07 × 72,878.12
  4. Step 4: Simplify right side
    86,957.81x = 9,493,181,421.68
  5. Step 5: Solve for x
    x = 9,493,181,421.68/86,957.81
  6. Step 6: Final answer
    x = 109,169.98

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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.