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Finding the Fourth Proportional to 158,970.33, 219,355.70 and 90,976.50

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Solution

The fourth proportional to 158,970.33, 219,355.70 and 90,976.50 is: 125,534.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,970.33 : 219,355.70 = 90,976.50 : x
  2. Step 2: Convert to fraction form
    158,970.33/219,355.70 = 90,976.50/x
  3. Step 3: Cross multiply
    158,970.33x = 219,355.70 × 90,976.50
  4. Step 4: Simplify right side
    158,970.33x = 19,956,213,386.17
  5. Step 5: Solve for x
    x = 19,956,213,386.17/158,970.33
  6. Step 6: Final answer
    x = 125,534.20

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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.