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Finding the Fourth Proportional to 154,813.05, 213,643.77 and 85,903.74

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Solution

The fourth proportional to 154,813.05, 213,643.77 and 85,903.74 is: 118,548.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,813.05 : 213,643.77 = 85,903.74 : x
  2. Step 2: Convert to fraction form
    154,813.05/213,643.77 = 85,903.74/x
  3. Step 3: Cross multiply
    154,813.05x = 213,643.77 × 85,903.74
  4. Step 4: Simplify right side
    154,813.05x = 18,352,798,870.70
  5. Step 5: Solve for x
    x = 18,352,798,870.70/154,813.05
  6. Step 6: Final answer
    x = 118,548.14

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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.