Home / 103,631.40-155,447.10-78,748.20

Finding the Fourth Proportional to 103,631.40, 155,447.10 and 78,748.20

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Solution

The fourth proportional to 103,631.40, 155,447.10 and 78,748.20 is: 118,122.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,631.40 : 155,447.10 = 78,748.20 : x
  2. Step 2: Convert to fraction form
    103,631.40/155,447.10 = 78,748.20/x
  3. Step 3: Cross multiply
    103,631.40x = 155,447.10 × 78,748.20
  4. Step 4: Simplify right side
    103,631.40x = 12,241,179,320.22
  5. Step 5: Solve for x
    x = 12,241,179,320.22/103,631.40
  6. Step 6: Final answer
    x = 118,122.30

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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.