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Finding the Fourth Proportional to 76,673.20, 105,808.80 and 43,139.20

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Solution

The fourth proportional to 76,673.20, 105,808.80 and 43,139.20 is: 59,531.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,673.20 : 105,808.80 = 43,139.20 : x
  2. Step 2: Convert to fraction form
    76,673.20/105,808.80 = 43,139.20/x
  3. Step 3: Cross multiply
    76,673.20x = 105,808.80 × 43,139.20
  4. Step 4: Simplify right side
    76,673.20x = 4,564,506,984.96
  5. Step 5: Solve for x
    x = 4,564,506,984.96/76,673.20
  6. Step 6: Final answer
    x = 59,531.97

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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.