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Finding the Fourth Proportional to 118,502.40, 177,868.80 and 71,846.40

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Solution

The fourth proportional to 118,502.40, 177,868.80 and 71,846.40 is: 107,839.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,502.40 : 177,868.80 = 71,846.40 : x
  2. Step 2: Convert to fraction form
    118,502.40/177,868.80 = 71,846.40/x
  3. Step 3: Cross multiply
    118,502.40x = 177,868.80 × 71,846.40
  4. Step 4: Simplify right side
    118,502.40x = 12,779,232,952.32
  5. Step 5: Solve for x
    x = 12,779,232,952.32/118,502.40
  6. Step 6: Final answer
    x = 107,839.44

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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.