Home / 145,319.28-217,899.88-45,436.40

Finding the Fourth Proportional to 145,319.28, 217,899.88 and 45,436.40

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Solution

The fourth proportional to 145,319.28, 217,899.88 and 45,436.40 is: 68,129.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,319.28 : 217,899.88 = 45,436.40 : x
  2. Step 2: Convert to fraction form
    145,319.28/217,899.88 = 45,436.40/x
  3. Step 3: Cross multiply
    145,319.28x = 217,899.88 × 45,436.40
  4. Step 4: Simplify right side
    145,319.28x = 9,900,586,107.63
  5. Step 5: Solve for x
    x = 9,900,586,107.63/145,319.28
  6. Step 6: Final answer
    x = 68,129.89

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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.