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Finding the Fourth Proportional to 158,398.92, 218,557.74 and 90,438.01

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Solution

The fourth proportional to 158,398.92, 218,557.74 and 90,438.01 is: 124,785.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,398.92 : 218,557.74 = 90,438.01 : x
  2. Step 2: Convert to fraction form
    158,398.92/218,557.74 = 90,438.01/x
  3. Step 3: Cross multiply
    158,398.92x = 218,557.74 × 90,438.01
  4. Step 4: Simplify right side
    158,398.92x = 19,765,927,075.70
  5. Step 5: Solve for x
    x = 19,765,927,075.70/158,398.92
  6. Step 6: Final answer
    x = 124,785.74

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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.