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Finding the Fourth Proportional to 103,775.40, 155,663.10 and 51,287.40

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Solution

The fourth proportional to 103,775.40, 155,663.10 and 51,287.40 is: 76,931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,775.40 : 155,663.10 = 51,287.40 : x
  2. Step 2: Convert to fraction form
    103,775.40/155,663.10 = 51,287.40/x
  3. Step 3: Cross multiply
    103,775.40x = 155,663.10 × 51,287.40
  4. Step 4: Simplify right side
    103,775.40x = 7,983,555,674.94
  5. Step 5: Solve for x
    x = 7,983,555,674.94/103,775.40
  6. Step 6: Final answer
    x = 76,931.10

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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.