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Finding the Fourth Proportional to 258,574.58, 387,738.59 and 90,074.18

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Solution

The fourth proportional to 258,574.58, 387,738.59 and 90,074.18 is: 135,068.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,574.58 : 387,738.59 = 90,074.18 : x
  2. Step 2: Convert to fraction form
    258,574.58/387,738.59 = 90,074.18/x
  3. Step 3: Cross multiply
    258,574.58x = 387,738.59 × 90,074.18
  4. Step 4: Simplify right side
    258,574.58x = 34,925,235,548.61
  5. Step 5: Solve for x
    x = 34,925,235,548.61/258,574.58
  6. Step 6: Final answer
    x = 135,068.33

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1.5x scale

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.