Home / 56,909.08-78,538.87-31,420.35

Finding the Fourth Proportional to 56,909.08, 78,538.87 and 31,420.35

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Solution

The fourth proportional to 56,909.08, 78,538.87 and 31,420.35 is: 43,362.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,909.08 : 78,538.87 = 31,420.35 : x
  2. Step 2: Convert to fraction form
    56,909.08/78,538.87 = 31,420.35/x
  3. Step 3: Cross multiply
    56,909.08x = 78,538.87 × 31,420.35
  4. Step 4: Simplify right side
    56,909.08x = 2,467,718,823.28
  5. Step 5: Solve for x
    x = 2,467,718,823.28/56,909.08
  6. Step 6: Final answer
    x = 43,362.48

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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.