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Finding the Fourth Proportional to 102,613.60, 153,570.30 and 85,992.40

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Solution

The fourth proportional to 102,613.60, 153,570.30 and 85,992.40 is: 128,695.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,613.60 : 153,570.30 = 85,992.40 : x
  2. Step 2: Convert to fraction form
    102,613.60/153,570.30 = 85,992.40/x
  3. Step 3: Cross multiply
    102,613.60x = 153,570.30 × 85,992.40
  4. Step 4: Simplify right side
    102,613.60x = 13,205,878,665.72
  5. Step 5: Solve for x
    x = 13,205,878,665.72/102,613.60
  6. Step 6: Final answer
    x = 128,695.21

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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.