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Finding the Fourth Proportional to 122,307.51, 168,628.12 and 79,210.86

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Solution

The fourth proportional to 122,307.51, 168,628.12 and 79,210.86 is: 109,209.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,307.51 : 168,628.12 = 79,210.86 : x
  2. Step 2: Convert to fraction form
    122,307.51/168,628.12 = 79,210.86/x
  3. Step 3: Cross multiply
    122,307.51x = 168,628.12 × 79,210.86
  4. Step 4: Simplify right side
    122,307.51x = 13,357,178,405.38
  5. Step 5: Solve for x
    x = 13,357,178,405.38/122,307.51
  6. Step 6: Final answer
    x = 109,209.80

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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.