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Finding the Fourth Proportional to 123,258.63, 170,099.16 and 72,307.92

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Solution

The fourth proportional to 123,258.63, 170,099.16 and 72,307.92 is: 99,786.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,258.63 : 170,099.16 = 72,307.92 : x
  2. Step 2: Convert to fraction form
    123,258.63/170,099.16 = 72,307.92/x
  3. Step 3: Cross multiply
    123,258.63x = 170,099.16 × 72,307.92
  4. Step 4: Simplify right side
    123,258.63x = 12,299,516,453.35
  5. Step 5: Solve for x
    x = 12,299,516,453.35/123,258.63
  6. Step 6: Final answer
    x = 99,786.25

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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.