Home / 103,780.78-143,228.26-63,521.34

Finding the Fourth Proportional to 103,780.78, 143,228.26 and 63,521.34

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Solution

The fourth proportional to 103,780.78, 143,228.26 and 63,521.34 is: 87,666.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,780.78 : 143,228.26 = 63,521.34 : x
  2. Step 2: Convert to fraction form
    103,780.78/143,228.26 = 63,521.34/x
  3. Step 3: Cross multiply
    103,780.78x = 143,228.26 × 63,521.34
  4. Step 4: Simplify right side
    103,780.78x = 9,098,051,001.07
  5. Step 5: Solve for x
    x = 9,098,051,001.07/103,780.78
  6. Step 6: Final answer
    x = 87,666.05

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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.