Home / 103,694.10-155,705.18-78,762.30

Finding the Fourth Proportional to 103,694.10, 155,705.18 and 78,762.30

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Solution

The fourth proportional to 103,694.10, 155,705.18 and 78,762.30 is: 118,268.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,694.10 : 155,705.18 = 78,762.30 : x
  2. Step 2: Convert to fraction form
    103,694.10/155,705.18 = 78,762.30/x
  3. Step 3: Cross multiply
    103,694.10x = 155,705.18 × 78,762.30
  4. Step 4: Simplify right side
    103,694.10x = 12,263,698,098.71
  5. Step 5: Solve for x
    x = 12,263,698,098.71/103,694.10
  6. Step 6: Final answer
    x = 118,268.04

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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.