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Finding the Fourth Proportional to 128,008.40, 192,427.32 and 127,386.32

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Solution

The fourth proportional to 128,008.40, 192,427.32 and 127,386.32 is: 191,492.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,008.40 : 192,427.32 = 127,386.32 : x
  2. Step 2: Convert to fraction form
    128,008.40/192,427.32 = 127,386.32/x
  3. Step 3: Cross multiply
    128,008.40x = 192,427.32 × 127,386.32
  4. Step 4: Simplify right side
    128,008.40x = 24,512,608,162.26
  5. Step 5: Solve for x
    x = 24,512,608,162.26/128,008.40
  6. Step 6: Final answer
    x = 191,492.18

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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.