Home / 86,677.10-130,015.65-81,428.30

Finding the Fourth Proportional to 86,677.10, 130,015.65 and 81,428.30

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Solution

The fourth proportional to 86,677.10, 130,015.65 and 81,428.30 is: 122,142.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,677.10 : 130,015.65 = 81,428.30 : x
  2. Step 2: Convert to fraction form
    86,677.10/130,015.65 = 81,428.30/x
  3. Step 3: Cross multiply
    86,677.10x = 130,015.65 × 81,428.30
  4. Step 4: Simplify right side
    86,677.10x = 10,586,953,352.90
  5. Step 5: Solve for x
    x = 10,586,953,352.90/86,677.10
  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.