Home / 56,421.72-77,858.91-30,928.08

Finding the Fourth Proportional to 56,421.72, 77,858.91 and 30,928.08

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Solution

The fourth proportional to 56,421.72, 77,858.91 and 30,928.08 is: 42,679.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,421.72 : 77,858.91 = 30,928.08 : x
  2. Step 2: Convert to fraction form
    56,421.72/77,858.91 = 30,928.08/x
  3. Step 3: Cross multiply
    56,421.72x = 77,858.91 × 30,928.08
  4. Step 4: Simplify right side
    56,421.72x = 2,408,026,597.19
  5. Step 5: Solve for x
    x = 2,408,026,597.19/56,421.72
  6. Step 6: Final answer
    x = 42,679.07

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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.