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Finding the Fourth Proportional to 103,307.84, 155,021.59 and 43,330.98

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Solution

The fourth proportional to 103,307.84, 155,021.59 and 43,330.98 is: 65,021.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,307.84 : 155,021.59 = 43,330.98 : x
  2. Step 2: Convert to fraction form
    103,307.84/155,021.59 = 43,330.98/x
  3. Step 3: Cross multiply
    103,307.84x = 155,021.59 × 43,330.98
  4. Step 4: Simplify right side
    103,307.84x = 6,717,236,424.10
  5. Step 5: Solve for x
    x = 6,717,236,424.10/103,307.84
  6. Step 6: Final answer
    x = 65,021.56

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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.