Home / 76,135.20-105,064.40-42,145.08

Finding the Fourth Proportional to 76,135.20, 105,064.40 and 42,145.08

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Solution

The fourth proportional to 76,135.20, 105,064.40 and 42,145.08 is: 58,159.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,135.20 : 105,064.40 = 42,145.08 : x
  2. Step 2: Convert to fraction form
    76,135.20/105,064.40 = 42,145.08/x
  3. Step 3: Cross multiply
    76,135.20x = 105,064.40 × 42,145.08
  4. Step 4: Simplify right side
    76,135.20x = 4,427,947,543.15
  5. Step 5: Solve for x
    x = 4,427,947,543.15/76,135.20
  6. Step 6: Final answer
    x = 58,159.01

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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.