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Finding the Fourth Proportional to 103,503.69, 155,006.42 and 70,122.55

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Solution

The fourth proportional to 103,503.69, 155,006.42 and 70,122.55 is: 105,015.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,503.69 : 155,006.42 = 70,122.55 : x
  2. Step 2: Convert to fraction form
    103,503.69/155,006.42 = 70,122.55/x
  3. Step 3: Cross multiply
    103,503.69x = 155,006.42 × 70,122.55
  4. Step 4: Simplify right side
    103,503.69x = 10,869,445,556.28
  5. Step 5: Solve for x
    x = 10,869,445,556.28/103,503.69
  6. Step 6: Final answer
    x = 105,015.05

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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.