Home / 81,455.22-112,411.23-45,643.90

Finding the Fourth Proportional to 81,455.22, 112,411.23 and 45,643.90

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Solution

The fourth proportional to 81,455.22, 112,411.23 and 45,643.90 is: 62,990.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,455.22 : 112,411.23 = 45,643.90 : x
  2. Step 2: Convert to fraction form
    81,455.22/112,411.23 = 45,643.90/x
  3. Step 3: Cross multiply
    81,455.22x = 112,411.23 × 45,643.90
  4. Step 4: Simplify right side
    81,455.22x = 5,130,886,941.00
  5. Step 5: Solve for x
    x = 5,130,886,941.00/81,455.22
  6. Step 6: Final answer
    x = 62,990.28

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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.