Home / 113,428.40-156,551.16-86,529.20

Finding the Fourth Proportional to 113,428.40, 156,551.16 and 86,529.20

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Solution

The fourth proportional to 113,428.40, 156,551.16 and 86,529.20 is: 119,425.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,428.40 : 156,551.16 = 86,529.20 : x
  2. Step 2: Convert to fraction form
    113,428.40/156,551.16 = 86,529.20/x
  3. Step 3: Cross multiply
    113,428.40x = 156,551.16 × 86,529.20
  4. Step 4: Simplify right side
    113,428.40x = 13,546,246,633.87
  5. Step 5: Solve for x
    x = 13,546,246,633.87/113,428.40
  6. Step 6: Final answer
    x = 119,425.53

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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.