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Finding the Fourth Proportional to 145,638.19, 218,482.19 and 66,759.18

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Solution

The fourth proportional to 145,638.19, 218,482.19 and 66,759.18 is: 100,150.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,638.19 : 218,482.19 = 66,759.18 : x
  2. Step 2: Convert to fraction form
    145,638.19/218,482.19 = 66,759.18/x
  3. Step 3: Cross multiply
    145,638.19x = 218,482.19 × 66,759.18
  4. Step 4: Simplify right side
    145,638.19x = 14,585,691,849.00
  5. Step 5: Solve for x
    x = 14,585,691,849.00/145,638.19
  6. Step 6: Final answer
    x = 100,150.19

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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.