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Finding the Fourth Proportional to 121,603.58, 167,889.84 and 83,427.02

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Solution

The fourth proportional to 121,603.58, 167,889.84 and 83,427.02 is: 115,182.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,603.58 : 167,889.84 = 83,427.02 : x
  2. Step 2: Convert to fraction form
    121,603.58/167,889.84 = 83,427.02/x
  3. Step 3: Cross multiply
    121,603.58x = 167,889.84 × 83,427.02
  4. Step 4: Simplify right side
    121,603.58x = 14,006,549,039.48
  5. Step 5: Solve for x
    x = 14,006,549,039.48/121,603.58
  6. Step 6: Final answer
    x = 115,182.05

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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.