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Finding the Fourth Proportional to 145,909.01, 201,350.34 and 81,380.21

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Solution

The fourth proportional to 145,909.01, 201,350.34 and 81,380.21 is: 112,302.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,909.01 : 201,350.34 = 81,380.21 : x
  2. Step 2: Convert to fraction form
    145,909.01/201,350.34 = 81,380.21/x
  3. Step 3: Cross multiply
    145,909.01x = 201,350.34 × 81,380.21
  4. Step 4: Simplify right side
    145,909.01x = 16,385,931,946.02
  5. Step 5: Solve for x
    x = 16,385,931,946.02/145,909.01
  6. Step 6: Final answer
    x = 112,302.40

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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.