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Finding the Fourth Proportional to 103,497.10, 155,245.65 and 86,001.10

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Solution

The fourth proportional to 103,497.10, 155,245.65 and 86,001.10 is: 129,001.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,497.10 : 155,245.65 = 86,001.10 : x
  2. Step 2: Convert to fraction form
    103,497.10/155,245.65 = 86,001.10/x
  3. Step 3: Cross multiply
    103,497.10x = 155,245.65 × 86,001.10
  4. Step 4: Simplify right side
    103,497.10x = 13,351,296,670.22
  5. Step 5: Solve for x
    x = 13,351,296,670.22/103,497.10
  6. Step 6: Final answer
    x = 129,001.65

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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.