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Finding the Fourth Proportional to 121,955.42, 168,070.50 and 87,905.04

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Solution

The fourth proportional to 121,955.42, 168,070.50 and 87,905.04 is: 121,144.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,955.42 : 168,070.50 = 87,905.04 : x
  2. Step 2: Convert to fraction form
    121,955.42/168,070.50 = 87,905.04/x
  3. Step 3: Cross multiply
    121,955.42x = 168,070.50 × 87,905.04
  4. Step 4: Simplify right side
    121,955.42x = 14,774,244,025.32
  5. Step 5: Solve for x
    x = 14,774,244,025.32/121,955.42
  6. Step 6: Final answer
    x = 121,144.63

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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.