Home / 103,618.60-155,427.90-78,735.40

Finding the Fourth Proportional to 103,618.60, 155,427.90 and 78,735.40

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Solution

The fourth proportional to 103,618.60, 155,427.90 and 78,735.40 is: 118,103.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,618.60 : 155,427.90 = 78,735.40 : x
  2. Step 2: Convert to fraction form
    103,618.60/155,427.90 = 78,735.40/x
  3. Step 3: Cross multiply
    103,618.60x = 155,427.90 × 78,735.40
  4. Step 4: Simplify right side
    103,618.60x = 12,237,677,877.66
  5. Step 5: Solve for x
    x = 12,237,677,877.66/103,618.60
  6. Step 6: Final answer
    x = 118,103.10

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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.