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Finding the Fourth Proportional to 88,300.80, 121,435.20 and 81,302.40

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Solution

The fourth proportional to 88,300.80, 121,435.20 and 81,302.40 is: 111,810.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,300.80 : 121,435.20 = 81,302.40 : x
  2. Step 2: Convert to fraction form
    88,300.80/121,435.20 = 81,302.40/x
  3. Step 3: Cross multiply
    88,300.80x = 121,435.20 × 81,302.40
  4. Step 4: Simplify right side
    88,300.80x = 9,872,973,204.48
  5. Step 5: Solve for x
    x = 9,872,973,204.48/88,300.80
  6. Step 6: Final answer
    x = 111,810.69

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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.