Home / 77,985.90-116,977.80-18,821.04

Finding the Fourth Proportional to 77,985.90, 116,977.80 and 18,821.04

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Solution

The fourth proportional to 77,985.90, 116,977.80 and 18,821.04 is: 28,231.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,985.90 : 116,977.80 = 18,821.04 : x
  2. Step 2: Convert to fraction form
    77,985.90/116,977.80 = 18,821.04/x
  3. Step 3: Cross multiply
    77,985.90x = 116,977.80 × 18,821.04
  4. Step 4: Simplify right side
    77,985.90x = 2,201,643,852.91
  5. Step 5: Solve for x
    x = 2,201,643,852.91/77,985.90
  6. Step 6: Final answer
    x = 28,231.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.