Home / 77,775.81-107,338.68-47,581.25

Finding the Fourth Proportional to 77,775.81, 107,338.68 and 47,581.25

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Solution

The fourth proportional to 77,775.81, 107,338.68 and 47,581.25 is: 65,667.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,775.81 : 107,338.68 = 47,581.25 : x
  2. Step 2: Convert to fraction form
    77,775.81/107,338.68 = 47,581.25/x
  3. Step 3: Cross multiply
    77,775.81x = 107,338.68 × 47,581.25
  4. Step 4: Simplify right side
    77,775.81x = 5,107,308,031.06
  5. Step 5: Solve for x
    x = 5,107,308,031.06/77,775.81
  6. Step 6: Final answer
    x = 65,667.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.