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Finding the Fourth Proportional to 122,303.17, 168,706.69 and 76,909.15

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Solution

The fourth proportional to 122,303.17, 168,706.69 and 76,909.15 is: 106,089.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,303.17 : 168,706.69 = 76,909.15 : x
  2. Step 2: Convert to fraction form
    122,303.17/168,706.69 = 76,909.15/x
  3. Step 3: Cross multiply
    122,303.17x = 168,706.69 × 76,909.15
  4. Step 4: Simplify right side
    122,303.17x = 12,975,088,127.21
  5. Step 5: Solve for x
    x = 12,975,088,127.21/122,303.17
  6. Step 6: Final answer
    x = 106,089.55

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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.