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Finding the Fourth Proportional to 76,349.40, 105,362.80 and 42,360.11

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Solution

The fourth proportional to 76,349.40, 105,362.80 and 42,360.11 is: 58,457.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,349.40 : 105,362.80 = 42,360.11 : x
  2. Step 2: Convert to fraction form
    76,349.40/105,362.80 = 42,360.11/x
  3. Step 3: Cross multiply
    76,349.40x = 105,362.80 × 42,360.11
  4. Step 4: Simplify right side
    76,349.40x = 4,463,179,797.91
  5. Step 5: Solve for x
    x = 4,463,179,797.91/76,349.40
  6. Step 6: Final answer
    x = 58,457.30

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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.