Home / 88,685.90-133,028.85-81,428.30

Finding the Fourth Proportional to 88,685.90, 133,028.85 and 81,428.30

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Solution

The fourth proportional to 88,685.90, 133,028.85 and 81,428.30 is: 122,142.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,685.90 : 133,028.85 = 81,428.30 : x
  2. Step 2: Convert to fraction form
    88,685.90/133,028.85 = 81,428.30/x
  3. Step 3: Cross multiply
    88,685.90x = 133,028.85 × 81,428.30
  4. Step 4: Simplify right side
    88,685.90x = 10,832,313,106.46
  5. Step 5: Solve for x
    x = 10,832,313,106.46/88,685.90
  6. Step 6: Final answer
    x = 122,142.45

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1.5x scale

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.