Home / 103,897.21-143,311.66-72,054.49

Finding the Fourth Proportional to 103,897.21, 143,311.66 and 72,054.49

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Solution

The fourth proportional to 103,897.21, 143,311.66 and 72,054.49 is: 99,389.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,897.21 : 143,311.66 = 72,054.49 : x
  2. Step 2: Convert to fraction form
    103,897.21/143,311.66 = 72,054.49/x
  3. Step 3: Cross multiply
    103,897.21x = 143,311.66 × 72,054.49
  4. Step 4: Simplify right side
    103,897.21x = 10,326,248,572.35
  5. Step 5: Solve for x
    x = 10,326,248,572.35/103,897.21
  6. Step 6: Final answer
    x = 99,389.08

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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.