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Finding the Fourth Proportional to 103,518.60, 155,277.90 and 72,025.80

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Solution

The fourth proportional to 103,518.60, 155,277.90 and 72,025.80 is: 108,038.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,518.60 : 155,277.90 = 72,025.80 : x
  2. Step 2: Convert to fraction form
    103,518.60/155,277.90 = 72,025.80/x
  3. Step 3: Cross multiply
    103,518.60x = 155,277.90 × 72,025.80
  4. Step 4: Simplify right side
    103,518.60x = 11,184,014,969.82
  5. Step 5: Solve for x
    x = 11,184,014,969.82/103,518.60
  6. Step 6: Final answer
    x = 108,038.70

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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.