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Finding the Fourth Proportional to 76,155.68, 105,095.44 and 42,621.60

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Solution

The fourth proportional to 76,155.68, 105,095.44 and 42,621.60 is: 58,818.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,155.68 : 105,095.44 = 42,621.60 : x
  2. Step 2: Convert to fraction form
    76,155.68/105,095.44 = 42,621.60/x
  3. Step 3: Cross multiply
    76,155.68x = 105,095.44 × 42,621.60
  4. Step 4: Simplify right side
    76,155.68x = 4,479,335,805.50
  5. Step 5: Solve for x
    x = 4,479,335,805.50/76,155.68
  6. Step 6: Final answer
    x = 58,818.14

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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.