Home / 81,813.18-113,103.39-81,064.74

Finding the Fourth Proportional to 81,813.18, 113,103.39 and 81,064.74

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Solution

The fourth proportional to 81,813.18, 113,103.39 and 81,064.74 is: 112,068.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,813.18 : 113,103.39 = 81,064.74 : x
  2. Step 2: Convert to fraction form
    81,813.18/113,103.39 = 81,064.74/x
  3. Step 3: Cross multiply
    81,813.18x = 113,103.39 × 81,064.74
  4. Step 4: Simplify right side
    81,813.18x = 9,168,696,903.47
  5. Step 5: Solve for x
    x = 9,168,696,903.47/81,813.18
  6. Step 6: Final answer
    x = 112,068.70

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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.