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Finding the Fourth Proportional to 127,258.90, 190,888.35 and 103,639.30

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Solution

The fourth proportional to 127,258.90, 190,888.35 and 103,639.30 is: 155,458.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,258.90 : 190,888.35 = 103,639.30 : x
  2. Step 2: Convert to fraction form
    127,258.90/190,888.35 = 103,639.30/x
  3. Step 3: Cross multiply
    127,258.90x = 190,888.35 × 103,639.30
  4. Step 4: Simplify right side
    127,258.90x = 19,783,534,972.16
  5. Step 5: Solve for x
    x = 19,783,534,972.16/127,258.90
  6. Step 6: Final answer
    x = 155,458.95

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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.