Home / 55,319.02-76,340.21-31,447.20

Finding the Fourth Proportional to 55,319.02, 76,340.21 and 31,447.20

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Solution

The fourth proportional to 55,319.02, 76,340.21 and 31,447.20 is: 43,397.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,319.02 : 76,340.21 = 31,447.20 : x
  2. Step 2: Convert to fraction form
    55,319.02/76,340.21 = 31,447.20/x
  3. Step 3: Cross multiply
    55,319.02x = 76,340.21 × 31,447.20
  4. Step 4: Simplify right side
    55,319.02x = 2,400,685,980.95
  5. Step 5: Solve for x
    x = 2,400,685,980.95/55,319.02
  6. Step 6: Final answer
    x = 43,397.12

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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.