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Finding the Fourth Proportional to 145,663.58, 201,012.65 and 81,132.62

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Solution

The fourth proportional to 145,663.58, 201,012.65 and 81,132.62 is: 111,961.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,663.58 : 201,012.65 = 81,132.62 : x
  2. Step 2: Convert to fraction form
    145,663.58/201,012.65 = 81,132.62/x
  3. Step 3: Cross multiply
    145,663.58x = 201,012.65 × 81,132.62
  4. Step 4: Simplify right side
    145,663.58x = 16,308,681,536.92
  5. Step 5: Solve for x
    x = 16,308,681,536.92/145,663.58
  6. Step 6: Final answer
    x = 111,961.29

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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.