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Finding the Fourth Proportional to 153,195, 211,409.10 and 86,127.48

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Solution

The fourth proportional to 153,195, 211,409.10 and 86,127.48 is: 118,855.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,195 : 211,409.10 = 86,127.48 : x
  2. Step 2: Convert to fraction form
    153,195/211,409.10 = 86,127.48/x
  3. Step 3: Cross multiply
    153,195x = 211,409.10 × 86,127.48
  4. Step 4: Simplify right side
    153,195x = 18,208,133,032.07
  5. Step 5: Solve for x
    x = 18,208,133,032.07/153,195
  6. Step 6: Final answer
    x = 118,855.92

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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.