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Finding the Fourth Proportional to 103,690.60, 155,407.90 and 70,410.60

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Solution

The fourth proportional to 103,690.60, 155,407.90 and 70,410.60 is: 105,528.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,690.60 : 155,407.90 = 70,410.60 : x
  2. Step 2: Convert to fraction form
    103,690.60/155,407.90 = 70,410.60/x
  3. Step 3: Cross multiply
    103,690.60x = 155,407.90 × 70,410.60
  4. Step 4: Simplify right side
    103,690.60x = 10,942,363,483.74
  5. Step 5: Solve for x
    x = 10,942,363,483.74/103,690.60
  6. Step 6: Final answer
    x = 105,528.98

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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.