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Finding the Fourth Proportional to 76,339.99, 105,349.82 and 42,350.70

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Solution

The fourth proportional to 76,339.99, 105,349.82 and 42,350.70 is: 58,444.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,339.99 : 105,349.82 = 42,350.70 : x
  2. Step 2: Convert to fraction form
    76,339.99/105,349.82 = 42,350.70/x
  3. Step 3: Cross multiply
    76,339.99x = 105,349.82 × 42,350.70
  4. Step 4: Simplify right side
    76,339.99x = 4,461,638,410.12
  5. Step 5: Solve for x
    x = 4,461,638,410.12/76,339.99
  6. Step 6: Final answer
    x = 58,444.32

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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.