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Finding the Fourth Proportional to 163,987.20, 245,980.80 and 143,251.20

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Solution

The fourth proportional to 163,987.20, 245,980.80 and 143,251.20 is: 214,876.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,987.20 : 245,980.80 = 143,251.20 : x
  2. Step 2: Convert to fraction form
    163,987.20/245,980.80 = 143,251.20/x
  3. Step 3: Cross multiply
    163,987.20x = 245,980.80 × 143,251.20
  4. Step 4: Simplify right side
    163,987.20x = 35,237,044,776.96
  5. Step 5: Solve for x
    x = 35,237,044,776.96/163,987.20
  6. Step 6: Final answer
    x = 214,876.80

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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.