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Finding the Fourth Proportional to 103,513.90, 155,270.85 and 97,390.30

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Solution

The fourth proportional to 103,513.90, 155,270.85 and 97,390.30 is: 146,085.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,513.90 : 155,270.85 = 97,390.30 : x
  2. Step 2: Convert to fraction form
    103,513.90/155,270.85 = 97,390.30/x
  3. Step 3: Cross multiply
    103,513.90x = 155,270.85 × 97,390.30
  4. Step 4: Simplify right side
    103,513.90x = 15,121,874,662.76
  5. Step 5: Solve for x
    x = 15,121,874,662.76/103,513.90
  6. Step 6: Final answer
    x = 146,085.45

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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.