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Finding the Fourth Proportional to 91,323.90, 137,007.45 and 28,994.40

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Solution

The fourth proportional to 91,323.90, 137,007.45 and 28,994.40 is: 43,498.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,323.90 : 137,007.45 = 28,994.40 : x
  2. Step 2: Convert to fraction form
    91,323.90/137,007.45 = 28,994.40/x
  3. Step 3: Cross multiply
    91,323.90x = 137,007.45 × 28,994.40
  4. Step 4: Simplify right side
    91,323.90x = 3,972,448,808.28
  5. Step 5: Solve for x
    x = 3,972,448,808.28/91,323.90
  6. Step 6: Final answer
    x = 43,498.46

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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.