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Finding the Fourth Proportional to 118,012.80, 177,019.20 and 113,347.20

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Solution

The fourth proportional to 118,012.80, 177,019.20 and 113,347.20 is: 170,020.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,012.80 : 177,019.20 = 113,347.20 : x
  2. Step 2: Convert to fraction form
    118,012.80/177,019.20 = 113,347.20/x
  3. Step 3: Cross multiply
    118,012.80x = 177,019.20 × 113,347.20
  4. Step 4: Simplify right side
    118,012.80x = 20,064,630,666.24
  5. Step 5: Solve for x
    x = 20,064,630,666.24/118,012.80
  6. Step 6: Final answer
    x = 170,020.80

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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.