Home / 103,539.01-142,531.23-76,630.81

Finding the Fourth Proportional to 103,539.01, 142,531.23 and 76,630.81

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Solution

The fourth proportional to 103,539.01, 142,531.23 and 76,630.81 is: 105,489.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,539.01 : 142,531.23 = 76,630.81 : x
  2. Step 2: Convert to fraction form
    103,539.01/142,531.23 = 76,630.81/x
  3. Step 3: Cross multiply
    103,539.01x = 142,531.23 × 76,630.81
  4. Step 4: Simplify right side
    103,539.01x = 10,922,283,605.20
  5. Step 5: Solve for x
    x = 10,922,283,605.20/103,539.01
  6. Step 6: Final answer
    x = 105,489.55

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1.5x scale

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.