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Finding the Fourth Proportional to 121,907.86, 168,165.14 and 70,914.85

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Solution

The fourth proportional to 121,907.86, 168,165.14 and 70,914.85 is: 97,823.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,907.86 : 168,165.14 = 70,914.85 : x
  2. Step 2: Convert to fraction form
    121,907.86/168,165.14 = 70,914.85/x
  3. Step 3: Cross multiply
    121,907.86x = 168,165.14 × 70,914.85
  4. Step 4: Simplify right side
    121,907.86x = 11,925,404,903.34
  5. Step 5: Solve for x
    x = 11,925,404,903.34/121,907.86
  6. Step 6: Final answer
    x = 97,823.10

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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.