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Finding the Fourth Proportional to 255,898.50, 353,139.93 and 142,721.34

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Solution

The fourth proportional to 255,898.50, 353,139.93 and 142,721.34 is: 196,955.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,898.50 : 353,139.93 = 142,721.34 : x
  2. Step 2: Convert to fraction form
    255,898.50/353,139.93 = 142,721.34/x
  3. Step 3: Cross multiply
    255,898.50x = 353,139.93 × 142,721.34
  4. Step 4: Simplify right side
    255,898.50x = 50,400,604,017.11
  5. Step 5: Solve for x
    x = 50,400,604,017.11/255,898.50
  6. Step 6: Final answer
    x = 196,955.45

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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.