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Finding the Fourth Proportional to 305,770.40, 458,655.60 and 81,130.40

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Solution

The fourth proportional to 305,770.40, 458,655.60 and 81,130.40 is: 121,695.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,770.40 : 458,655.60 = 81,130.40 : x
  2. Step 2: Convert to fraction form
    305,770.40/458,655.60 = 81,130.40/x
  3. Step 3: Cross multiply
    305,770.40x = 458,655.60 × 81,130.40
  4. Step 4: Simplify right side
    305,770.40x = 37,210,912,290.24
  5. Step 5: Solve for x
    x = 37,210,912,290.24/305,770.40
  6. Step 6: Final answer
    x = 121,695.60

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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.