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Finding the Fourth Proportional to 145,655.87, 201,008.81 and 81,995.90

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Solution

The fourth proportional to 145,655.87, 201,008.81 and 81,995.90 is: 113,156.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,655.87 : 201,008.81 = 81,995.90 : x
  2. Step 2: Convert to fraction form
    145,655.87/201,008.81 = 81,995.90/x
  3. Step 3: Cross multiply
    145,655.87x = 201,008.81 × 81,995.90
  4. Step 4: Simplify right side
    145,655.87x = 16,481,897,483.82
  5. Step 5: Solve for x
    x = 16,481,897,483.82/145,655.87
  6. Step 6: Final answer
    x = 113,156.43

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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.