Home / 103,729.40-155,594.10-78,846.20

Finding the Fourth Proportional to 103,729.40, 155,594.10 and 78,846.20

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Solution

The fourth proportional to 103,729.40, 155,594.10 and 78,846.20 is: 118,269.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,729.40 : 155,594.10 = 78,846.20 : x
  2. Step 2: Convert to fraction form
    103,729.40/155,594.10 = 78,846.20/x
  3. Step 3: Cross multiply
    103,729.40x = 155,594.10 × 78,846.20
  4. Step 4: Simplify right side
    103,729.40x = 12,268,003,527.42
  5. Step 5: Solve for x
    x = 12,268,003,527.42/103,729.40
  6. Step 6: Final answer
    x = 118,269.30

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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.