Home / 103,713.90-155,570.85-78,830.70

Finding the Fourth Proportional to 103,713.90, 155,570.85 and 78,830.70

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Solution

The fourth proportional to 103,713.90, 155,570.85 and 78,830.70 is: 118,246.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,713.90 : 155,570.85 = 78,830.70 : x
  2. Step 2: Convert to fraction form
    103,713.90/155,570.85 = 78,830.70/x
  3. Step 3: Cross multiply
    103,713.90x = 155,570.85 × 78,830.70
  4. Step 4: Simplify right side
    103,713.90x = 12,263,759,005.10
  5. Step 5: Solve for x
    x = 12,263,759,005.10/103,713.90
  6. Step 6: Final answer
    x = 118,246.05

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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.