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Finding the Fourth Proportional to 215,230.60, 322,730.70 and 90,430.60

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Solution

The fourth proportional to 215,230.60, 322,730.70 and 90,430.60 is: 135,597.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,230.60 : 322,730.70 = 90,430.60 : x
  2. Step 2: Convert to fraction form
    215,230.60/322,730.70 = 90,430.60/x
  3. Step 3: Cross multiply
    215,230.60x = 322,730.70 × 90,430.60
  4. Step 4: Simplify right side
    215,230.60x = 29,184,730,839.42
  5. Step 5: Solve for x
    x = 29,184,730,839.42/215,230.60
  6. Step 6: Final answer
    x = 135,597.50

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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.