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Finding the Fourth Proportional to 163,407.80, 245,111.70 and 142,671.80

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Solution

The fourth proportional to 163,407.80, 245,111.70 and 142,671.80 is: 214,007.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,407.80 : 245,111.70 = 142,671.80 : x
  2. Step 2: Convert to fraction form
    163,407.80/245,111.70 = 142,671.80/x
  3. Step 3: Cross multiply
    163,407.80x = 245,111.70 × 142,671.80
  4. Step 4: Simplify right side
    163,407.80x = 34,970,527,440.06
  5. Step 5: Solve for x
    x = 34,970,527,440.06/163,407.80
  6. Step 6: Final answer
    x = 214,007.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.