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Finding the Fourth Proportional to 152,987.34, 211,120.65 and 85,919.34

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Solution

The fourth proportional to 152,987.34, 211,120.65 and 85,919.34 is: 118,567.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,987.34 : 211,120.65 = 85,919.34 : x
  2. Step 2: Convert to fraction form
    152,987.34/211,120.65 = 85,919.34/x
  3. Step 3: Cross multiply
    152,987.34x = 211,120.65 × 85,919.34
  4. Step 4: Simplify right side
    152,987.34x = 18,139,346,908.37
  5. Step 5: Solve for x
    x = 18,139,346,908.37/152,987.34
  6. Step 6: Final answer
    x = 118,567.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.