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Finding the Fourth Proportional to 145,663.34, 201,015.72 and 81,132.05

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Solution

The fourth proportional to 145,663.34, 201,015.72 and 81,132.05 is: 111,962.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,663.34 : 201,015.72 = 81,132.05 : x
  2. Step 2: Convert to fraction form
    145,663.34/201,015.72 = 81,132.05/x
  3. Step 3: Cross multiply
    145,663.34x = 201,015.72 × 81,132.05
  4. Step 4: Simplify right side
    145,663.34x = 16,308,816,440.75
  5. Step 5: Solve for x
    x = 16,308,816,440.75/145,663.34
  6. Step 6: Final answer
    x = 111,962.40

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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.