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Finding the Fourth Proportional to 103,699.60, 155,421.40 and 70,419.60

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Solution

The fourth proportional to 103,699.60, 155,421.40 and 70,419.60 is: 105,542.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,699.60 : 155,421.40 = 70,419.60 : x
  2. Step 2: Convert to fraction form
    103,699.60/155,421.40 = 70,419.60/x
  3. Step 3: Cross multiply
    103,699.60x = 155,421.40 × 70,419.60
  4. Step 4: Simplify right side
    103,699.60x = 10,944,712,819.44
  5. Step 5: Solve for x
    x = 10,944,712,819.44/103,699.60
  6. Step 6: Final answer
    x = 105,542.48

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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.