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Finding the Fourth Proportional to 253,158.72, 349,354.08 and 139,980.48

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Solution

The fourth proportional to 253,158.72, 349,354.08 and 139,980.48 is: 193,170.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,158.72 : 349,354.08 = 139,980.48 : x
  2. Step 2: Convert to fraction form
    253,158.72/349,354.08 = 139,980.48/x
  3. Step 3: Cross multiply
    253,158.72x = 349,354.08 × 139,980.48
  4. Step 4: Simplify right side
    253,158.72x = 48,902,751,808.36
  5. Step 5: Solve for x
    x = 48,902,751,808.36/253,158.72
  6. Step 6: Final answer
    x = 193,170.32

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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.