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Finding the Fourth Proportional to 213,914.99, 295,110 and 128,984.87

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Solution

The fourth proportional to 213,914.99, 295,110 and 128,984.87 is: 177,943.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,914.99 : 295,110 = 128,984.87 : x
  2. Step 2: Convert to fraction form
    213,914.99/295,110 = 128,984.87/x
  3. Step 3: Cross multiply
    213,914.99x = 295,110 × 128,984.87
  4. Step 4: Simplify right side
    213,914.99x = 38,064,724,985.70
  5. Step 5: Solve for x
    x = 38,064,724,985.70/213,914.99
  6. Step 6: Final answer
    x = 177,943.23

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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.