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Finding the Fourth Proportional to 245,443.20, 368,164.80 and 127,345.20

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Solution

The fourth proportional to 245,443.20, 368,164.80 and 127,345.20 is: 191,017.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,443.20 : 368,164.80 = 127,345.20 : x
  2. Step 2: Convert to fraction form
    245,443.20/368,164.80 = 127,345.20/x
  3. Step 3: Cross multiply
    245,443.20x = 368,164.80 × 127,345.20
  4. Step 4: Simplify right side
    245,443.20x = 46,884,020,088.96
  5. Step 5: Solve for x
    x = 46,884,020,088.96/245,443.20
  6. Step 6: Final answer
    x = 191,017.80

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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.