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Finding the Fourth Proportional to 98,792.80, 148,208.40 and 28,674.40

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Solution

The fourth proportional to 98,792.80, 148,208.40 and 28,674.40 is: 43,017.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,792.80 : 148,208.40 = 28,674.40 : x
  2. Step 2: Convert to fraction form
    98,792.80/148,208.40 = 28,674.40/x
  3. Step 3: Cross multiply
    98,792.80x = 148,208.40 × 28,674.40
  4. Step 4: Simplify right side
    98,792.80x = 4,249,786,944.96
  5. Step 5: Solve for x
    x = 4,249,786,944.96/98,792.80
  6. Step 6: Final answer
    x = 43,017.17

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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.