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Finding the Fourth Proportional to 242,880.64, 335,141.76 and 135,438.08

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Solution

The fourth proportional to 242,880.64, 335,141.76 and 135,438.08 is: 186,885.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,880.64 : 335,141.76 = 135,438.08 : x
  2. Step 2: Convert to fraction form
    242,880.64/335,141.76 = 135,438.08/x
  3. Step 3: Cross multiply
    242,880.64x = 335,141.76 × 135,438.08
  4. Step 4: Simplify right side
    242,880.64x = 45,390,956,502.22
  5. Step 5: Solve for x
    x = 45,390,956,502.22/242,880.64
  6. Step 6: Final answer
    x = 186,885.86

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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.