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Finding the Fourth Proportional to 243,534.56, 365,331.12 and 85,730.24

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Solution

The fourth proportional to 243,534.56, 365,331.12 and 85,730.24 is: 128,605.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,534.56 : 365,331.12 = 85,730.24 : x
  2. Step 2: Convert to fraction form
    243,534.56/365,331.12 = 85,730.24/x
  3. Step 3: Cross multiply
    243,534.56x = 365,331.12 × 85,730.24
  4. Step 4: Simplify right side
    243,534.56x = 31,319,924,597.07
  5. Step 5: Solve for x
    x = 31,319,924,597.07/243,534.56
  6. Step 6: Final answer
    x = 128,605.67

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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.