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Finding the Fourth Proportional to 158,406.75, 218,547.50 and 90,374.85

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Solution

The fourth proportional to 158,406.75, 218,547.50 and 90,374.85 is: 124,686.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,406.75 : 218,547.50 = 90,374.85 : x
  2. Step 2: Convert to fraction form
    158,406.75/218,547.50 = 90,374.85/x
  3. Step 3: Cross multiply
    158,406.75x = 218,547.50 × 90,374.85
  4. Step 4: Simplify right side
    158,406.75x = 19,751,197,078.50
  5. Step 5: Solve for x
    x = 19,751,197,078.50/158,406.75
  6. Step 6: Final answer
    x = 124,686.59

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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.