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Finding the Fourth Proportional to 122,419.20, 168,894.74 and 77,100.01

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Solution

The fourth proportional to 122,419.20, 168,894.74 and 77,100.01 is: 106,370.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,419.20 : 168,894.74 = 77,100.01 : x
  2. Step 2: Convert to fraction form
    122,419.20/168,894.74 = 77,100.01/x
  3. Step 3: Cross multiply
    122,419.20x = 168,894.74 × 77,100.01
  4. Step 4: Simplify right side
    122,419.20x = 13,021,785,479.77
  5. Step 5: Solve for x
    x = 13,021,785,479.77/122,419.20
  6. Step 6: Final answer
    x = 106,370.45

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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.