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Finding the Fourth Proportional to 76,155.19, 105,094.26 and 42,621.19

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Solution

The fourth proportional to 76,155.19, 105,094.26 and 42,621.19 is: 58,817.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,155.19 : 105,094.26 = 42,621.19 : x
  2. Step 2: Convert to fraction form
    76,155.19/105,094.26 = 42,621.19/x
  3. Step 3: Cross multiply
    76,155.19x = 105,094.26 × 42,621.19
  4. Step 4: Simplify right side
    76,155.19x = 4,479,242,160.63
  5. Step 5: Solve for x
    x = 4,479,242,160.63/76,155.19
  6. Step 6: Final answer
    x = 58,817.30

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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.