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Finding the Fourth Proportional to 145,763.40, 201,167.80 and 85,330.40

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Solution

The fourth proportional to 145,763.40, 201,167.80 and 85,330.40 is: 117,764.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,763.40 : 201,167.80 = 85,330.40 : x
  2. Step 2: Convert to fraction form
    145,763.40/201,167.80 = 85,330.40/x
  3. Step 3: Cross multiply
    145,763.40x = 201,167.80 × 85,330.40
  4. Step 4: Simplify right side
    145,763.40x = 17,165,728,841.12
  5. Step 5: Solve for x
    x = 17,165,728,841.12/145,763.40
  6. Step 6: Final answer
    x = 117,764.33

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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.