Home / 103,723.40-155,585.10-78,840.20

Finding the Fourth Proportional to 103,723.40, 155,585.10 and 78,840.20

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Solution

The fourth proportional to 103,723.40, 155,585.10 and 78,840.20 is: 118,260.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,723.40 : 155,585.10 = 78,840.20 : x
  2. Step 2: Convert to fraction form
    103,723.40/155,585.10 = 78,840.20/x
  3. Step 3: Cross multiply
    103,723.40x = 155,585.10 × 78,840.20
  4. Step 4: Simplify right side
    103,723.40x = 12,266,360,401.02
  5. Step 5: Solve for x
    x = 12,266,360,401.02/103,723.40
  6. Step 6: Final answer
    x = 118,260.30

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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.