Home / 122,311.08-168,789-74,564.40

Finding the Fourth Proportional to 122,311.08, 168,789 and 74,564.40

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Solution

The fourth proportional to 122,311.08, 168,789 and 74,564.40 is: 102,898.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,311.08 : 168,789 = 74,564.40 : x
  2. Step 2: Convert to fraction form
    122,311.08/168,789 = 74,564.40/x
  3. Step 3: Cross multiply
    122,311.08x = 168,789 × 74,564.40
  4. Step 4: Simplify right side
    122,311.08x = 12,585,650,511.60
  5. Step 5: Solve for x
    x = 12,585,650,511.60/122,311.08
  6. Step 6: Final answer
    x = 102,898.69

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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.