Home / 115,412.47-159,271.89-72,393.78

Finding the Fourth Proportional to 115,412.47, 159,271.89 and 72,393.78

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Solution

The fourth proportional to 115,412.47, 159,271.89 and 72,393.78 is: 99,905.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,412.47 : 159,271.89 = 72,393.78 : x
  2. Step 2: Convert to fraction form
    115,412.47/159,271.89 = 72,393.78/x
  3. Step 3: Cross multiply
    115,412.47x = 159,271.89 × 72,393.78
  4. Step 4: Simplify right side
    115,412.47x = 11,530,294,164.84
  5. Step 5: Solve for x
    x = 11,530,294,164.84/115,412.47
  6. Step 6: Final answer
    x = 99,905.10

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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.