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Finding the Fourth Proportional to 143,642.40, 215,472.96 and 117,290.40

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Solution

The fourth proportional to 143,642.40, 215,472.96 and 117,290.40 is: 175,943.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,642.40 : 215,472.96 = 117,290.40 : x
  2. Step 2: Convert to fraction form
    143,642.40/215,472.96 = 117,290.40/x
  3. Step 3: Cross multiply
    143,642.40x = 215,472.96 × 117,290.40
  4. Step 4: Simplify right side
    143,642.40x = 25,272,909,667.58
  5. Step 5: Solve for x
    x = 25,272,909,667.58/143,642.40
  6. Step 6: Final answer
    x = 175,943.24

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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.