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Finding the Fourth Proportional to 216,830.70, 299,322.54 and 139,388.22

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Solution

The fourth proportional to 216,830.70, 299,322.54 and 139,388.22 is: 192,417.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,830.70 : 299,322.54 = 139,388.22 : x
  2. Step 2: Convert to fraction form
    216,830.70/299,322.54 = 139,388.22/x
  3. Step 3: Cross multiply
    216,830.70x = 299,322.54 × 139,388.22
  4. Step 4: Simplify right side
    216,830.70x = 41,722,036,056.48
  5. Step 5: Solve for x
    x = 41,722,036,056.48/216,830.70
  6. Step 6: Final answer
    x = 192,417.57

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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.