Home / 113,807.72-170,578.65-85,637.22

Finding the Fourth Proportional to 113,807.72, 170,578.65 and 85,637.22

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Solution

The fourth proportional to 113,807.72, 170,578.65 and 85,637.22 is: 128,355.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,807.72 : 170,578.65 = 85,637.22 : x
  2. Step 2: Convert to fraction form
    113,807.72/170,578.65 = 85,637.22/x
  3. Step 3: Cross multiply
    113,807.72x = 170,578.65 × 85,637.22
  4. Step 4: Simplify right side
    113,807.72x = 14,607,882,437.87
  5. Step 5: Solve for x
    x = 14,607,882,437.87/113,807.72
  6. Step 6: Final answer
    x = 128,355.81

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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.