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Finding the Fourth Proportional to 153,199.71, 211,415.58 and 86,131.71

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Solution

The fourth proportional to 153,199.71, 211,415.58 and 86,131.71 is: 118,861.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,199.71 : 211,415.58 = 86,131.71 : x
  2. Step 2: Convert to fraction form
    153,199.71/211,415.58 = 86,131.71/x
  3. Step 3: Cross multiply
    153,199.71x = 211,415.58 × 86,131.71
  4. Step 4: Simplify right side
    153,199.71x = 18,209,585,426.04
  5. Step 5: Solve for x
    x = 18,209,585,426.04/153,199.71
  6. Step 6: Final answer
    x = 118,861.75

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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.