Home / 130,142.72-179,685.12-82,438.40

Finding the Fourth Proportional to 130,142.72, 179,685.12 and 82,438.40

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Solution

The fourth proportional to 130,142.72, 179,685.12 and 82,438.40 is: 113,820.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,142.72 : 179,685.12 = 82,438.40 : x
  2. Step 2: Convert to fraction form
    130,142.72/179,685.12 = 82,438.40/x
  3. Step 3: Cross multiply
    130,142.72x = 179,685.12 × 82,438.40
  4. Step 4: Simplify right side
    130,142.72x = 14,812,953,796.61
  5. Step 5: Solve for x
    x = 14,812,953,796.61/130,142.72
  6. Step 6: Final answer
    x = 113,820.84

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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.