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Finding the Fourth Proportional to 121,203.20, 181,804.80 and 83,878.40

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Solution

The fourth proportional to 121,203.20, 181,804.80 and 83,878.40 is: 125,817.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,203.20 : 181,804.80 = 83,878.40 : x
  2. Step 2: Convert to fraction form
    121,203.20/181,804.80 = 83,878.40/x
  3. Step 3: Cross multiply
    121,203.20x = 181,804.80 × 83,878.40
  4. Step 4: Simplify right side
    121,203.20x = 15,249,495,736.32
  5. Step 5: Solve for x
    x = 15,249,495,736.32/121,203.20
  6. Step 6: Final answer
    x = 125,817.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.