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Finding the Fourth Proportional to 102,590.10, 153,535.05 and 85,968.90

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Solution

The fourth proportional to 102,590.10, 153,535.05 and 85,968.90 is: 128,659.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,590.10 : 153,535.05 = 85,968.90 : x
  2. Step 2: Convert to fraction form
    102,590.10/153,535.05 = 85,968.90/x
  3. Step 3: Cross multiply
    102,590.10x = 153,535.05 × 85,968.90
  4. Step 4: Simplify right side
    102,590.10x = 13,199,239,359.95
  5. Step 5: Solve for x
    x = 13,199,239,359.95/102,590.10
  6. Step 6: Final answer
    x = 128,659.97

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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.