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Finding the Fourth Proportional to 103,681.60, 155,394.40 and 70,401.60

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Solution

The fourth proportional to 103,681.60, 155,394.40 and 70,401.60 is: 105,515.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,681.60 : 155,394.40 = 70,401.60 : x
  2. Step 2: Convert to fraction form
    103,681.60/155,394.40 = 70,401.60/x
  3. Step 3: Cross multiply
    103,681.60x = 155,394.40 × 70,401.60
  4. Step 4: Simplify right side
    103,681.60x = 10,940,014,391.04
  5. Step 5: Solve for x
    x = 10,940,014,391.04/103,681.60
  6. Step 6: Final answer
    x = 105,515.49

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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.