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Finding the Fourth Proportional to 103,573.99, 142,997.78 and 70,923.05

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Solution

The fourth proportional to 103,573.99, 142,997.78 and 70,923.05 is: 97,918.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,573.99 : 142,997.78 = 70,923.05 : x
  2. Step 2: Convert to fraction form
    103,573.99/142,997.78 = 70,923.05/x
  3. Step 3: Cross multiply
    103,573.99x = 142,997.78 × 70,923.05
  4. Step 4: Simplify right side
    103,573.99x = 10,141,837,985.84
  5. Step 5: Solve for x
    x = 10,141,837,985.84/103,573.99
  6. Step 6: Final answer
    x = 97,918.77

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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.