Home / 83,421.83-115,029.87-53,159.21

Finding the Fourth Proportional to 83,421.83, 115,029.87 and 53,159.21

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Solution

The fourth proportional to 83,421.83, 115,029.87 and 53,159.21 is: 73,300.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,421.83 : 115,029.87 = 53,159.21 : x
  2. Step 2: Convert to fraction form
    83,421.83/115,029.87 = 53,159.21/x
  3. Step 3: Cross multiply
    83,421.83x = 115,029.87 × 53,159.21
  4. Step 4: Simplify right side
    83,421.83x = 6,114,897,303.18
  5. Step 5: Solve for x
    x = 6,114,897,303.18/83,421.83
  6. Step 6: Final answer
    x = 73,300.93

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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.