Home / 76,669.20-105,803.28-43,135.20

Finding the Fourth Proportional to 76,669.20, 105,803.28 and 43,135.20

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Solution

The fourth proportional to 76,669.20, 105,803.28 and 43,135.20 is: 59,526.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,669.20 : 105,803.28 = 43,135.20 : x
  2. Step 2: Convert to fraction form
    76,669.20/105,803.28 = 43,135.20/x
  3. Step 3: Cross multiply
    76,669.20x = 105,803.28 × 43,135.20
  4. Step 4: Simplify right side
    76,669.20x = 4,563,845,643.46
  5. Step 5: Solve for x
    x = 4,563,845,643.46/76,669.20
  6. Step 6: Final answer
    x = 59,526.45

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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.