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Finding the Fourth Proportional to 76,674.20, 105,810.18 and 43,140.20

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Solution

The fourth proportional to 76,674.20, 105,810.18 and 43,140.20 is: 59,533.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,674.20 : 105,810.18 = 43,140.20 : x
  2. Step 2: Convert to fraction form
    76,674.20/105,810.18 = 43,140.20/x
  3. Step 3: Cross multiply
    76,674.20x = 105,810.18 × 43,140.20
  4. Step 4: Simplify right side
    76,674.20x = 4,564,672,327.24
  5. Step 5: Solve for x
    x = 4,564,672,327.24/76,674.20
  6. Step 6: Final answer
    x = 59,533.35

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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.