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Finding the Fourth Proportional to 201,783.80, 302,602.80 and 81,790.40

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Solution

The fourth proportional to 201,783.80, 302,602.80 and 81,790.40 is: 122,656.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,783.80 : 302,602.80 = 81,790.40 : x
  2. Step 2: Convert to fraction form
    201,783.80/302,602.80 = 81,790.40/x
  3. Step 3: Cross multiply
    201,783.80x = 302,602.80 × 81,790.40
  4. Step 4: Simplify right side
    201,783.80x = 24,750,004,053.12
  5. Step 5: Solve for x
    x = 24,750,004,053.12/201,783.80
  6. Step 6: Final answer
    x = 122,656.05

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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.