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Finding the Fourth Proportional to 145,988.64, 201,514.48 and 85,578.72

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Solution

The fourth proportional to 145,988.64, 201,514.48 and 85,578.72 is: 118,128.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,988.64 : 201,514.48 = 85,578.72 : x
  2. Step 2: Convert to fraction form
    145,988.64/201,514.48 = 85,578.72/x
  3. Step 3: Cross multiply
    145,988.64x = 201,514.48 × 85,578.72
  4. Step 4: Simplify right side
    145,988.64x = 17,245,351,259.87
  5. Step 5: Solve for x
    x = 17,245,351,259.87/145,988.64
  6. Step 6: Final answer
    x = 118,128.04

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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.