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Finding the Fourth Proportional to 170,899.80, 256,347.30 and 77,405.40

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Solution

The fourth proportional to 170,899.80, 256,347.30 and 77,405.40 is: 116,107.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,899.80 : 256,347.30 = 77,405.40 : x
  2. Step 2: Convert to fraction form
    170,899.80/256,347.30 = 77,405.40/x
  3. Step 3: Cross multiply
    170,899.80x = 256,347.30 × 77,405.40
  4. Step 4: Simplify right side
    170,899.80x = 19,842,665,295.42
  5. Step 5: Solve for x
    x = 19,842,665,295.42/170,899.80
  6. Step 6: Final answer
    x = 116,107.01

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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.