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Finding the Fourth Proportional to 171,613.40, 257,420.10 and 145,434.20

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Solution

The fourth proportional to 171,613.40, 257,420.10 and 145,434.20 is: 218,151.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,613.40 : 257,420.10 = 145,434.20 : x
  2. Step 2: Convert to fraction form
    171,613.40/257,420.10 = 145,434.20/x
  3. Step 3: Cross multiply
    171,613.40x = 257,420.10 × 145,434.20
  4. Step 4: Simplify right side
    171,613.40x = 37,437,686,307.42
  5. Step 5: Solve for x
    x = 37,437,686,307.42/171,613.40
  6. Step 6: Final answer
    x = 218,151.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.