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Finding the Fourth Proportional to 158,808.40, 219,112.80 and 90,811.34

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Solution

The fourth proportional to 158,808.40, 219,112.80 and 90,811.34 is: 125,295.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,808.40 : 219,112.80 = 90,811.34 : x
  2. Step 2: Convert to fraction form
    158,808.40/219,112.80 = 90,811.34/x
  3. Step 3: Cross multiply
    158,808.40x = 219,112.80 × 90,811.34
  4. Step 4: Simplify right side
    158,808.40x = 19,897,927,597.23
  5. Step 5: Solve for x
    x = 19,897,927,597.23/158,808.40
  6. Step 6: Final answer
    x = 125,295.19

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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.