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Finding the Fourth Proportional to 122,307.76, 168,628.47 and 79,211.12

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Solution

The fourth proportional to 122,307.76, 168,628.47 and 79,211.12 is: 109,210.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,307.76 : 168,628.47 = 79,211.12 : x
  2. Step 2: Convert to fraction form
    122,307.76/168,628.47 = 79,211.12/x
  3. Step 3: Cross multiply
    122,307.76x = 168,628.47 × 79,211.12
  4. Step 4: Simplify right side
    122,307.76x = 13,357,249,972.59
  5. Step 5: Solve for x
    x = 13,357,249,972.59/122,307.76
  6. Step 6: Final answer
    x = 109,210.16

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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.