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Finding the Fourth Proportional to 243,129.45, 335,535.54 and 135,720.45

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Solution

The fourth proportional to 243,129.45, 335,535.54 and 135,720.45 is: 187,303.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,129.45 : 335,535.54 = 135,720.45 : x
  2. Step 2: Convert to fraction form
    243,129.45/335,535.54 = 135,720.45/x
  3. Step 3: Cross multiply
    243,129.45x = 335,535.54 × 135,720.45
  4. Step 4: Simplify right side
    243,129.45x = 45,539,032,123.51
  5. Step 5: Solve for x
    x = 45,539,032,123.51/243,129.45
  6. Step 6: Final answer
    x = 187,303.65

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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.