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Finding the Fourth Proportional to 122,312.09, 168,832.13 and 77,065.89

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Solution

The fourth proportional to 122,312.09, 168,832.13 and 77,065.89 is: 106,377.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,312.09 : 168,832.13 = 77,065.89 : x
  2. Step 2: Convert to fraction form
    122,312.09/168,832.13 = 77,065.89/x
  3. Step 3: Cross multiply
    122,312.09x = 168,832.13 × 77,065.89
  4. Step 4: Simplify right side
    122,312.09x = 13,011,197,973.72
  5. Step 5: Solve for x
    x = 13,011,197,973.72/122,312.09
  6. Step 6: Final answer
    x = 106,377.04

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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.