Home / 74,621.12-102,986.98-42,783.80

Finding the Fourth Proportional to 74,621.12, 102,986.98 and 42,783.80

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Solution

The fourth proportional to 74,621.12, 102,986.98 and 42,783.80 is: 59,047.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,621.12 : 102,986.98 = 42,783.80 : x
  2. Step 2: Convert to fraction form
    74,621.12/102,986.98 = 42,783.80/x
  3. Step 3: Cross multiply
    74,621.12x = 102,986.98 × 42,783.80
  4. Step 4: Simplify right side
    74,621.12x = 4,406,174,354.92
  5. Step 5: Solve for x
    x = 4,406,174,354.92/74,621.12
  6. Step 6: Final answer
    x = 59,047.28

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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.