Home / 122,189.40-168,703.75-76,319.10

Finding the Fourth Proportional to 122,189.40, 168,703.75 and 76,319.10

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Solution

The fourth proportional to 122,189.40, 168,703.75 and 76,319.10 is: 105,371.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,189.40 : 168,703.75 = 76,319.10 : x
  2. Step 2: Convert to fraction form
    122,189.40/168,703.75 = 76,319.10/x
  3. Step 3: Cross multiply
    122,189.40x = 168,703.75 × 76,319.10
  4. Step 4: Simplify right side
    122,189.40x = 12,875,318,366.63
  5. Step 5: Solve for x
    x = 12,875,318,366.63/122,189.40
  6. Step 6: Final answer
    x = 105,371.81

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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.