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Finding the Fourth Proportional to 101,407.10, 152,110.65 and 85,855.10

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Solution

The fourth proportional to 101,407.10, 152,110.65 and 85,855.10 is: 128,782.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,407.10 : 152,110.65 = 85,855.10 : x
  2. Step 2: Convert to fraction form
    101,407.10/152,110.65 = 85,855.10/x
  3. Step 3: Cross multiply
    101,407.10x = 152,110.65 × 85,855.10
  4. Step 4: Simplify right side
    101,407.10x = 13,059,475,066.82
  5. Step 5: Solve for x
    x = 13,059,475,066.82/101,407.10
  6. Step 6: Final answer
    x = 128,782.65

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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.