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Finding the Fourth Proportional to 145,509.55, 200,830.74 and 91,087.06

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Solution

The fourth proportional to 145,509.55, 200,830.74 and 91,087.06 is: 125,717.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,509.55 : 200,830.74 = 91,087.06 : x
  2. Step 2: Convert to fraction form
    145,509.55/200,830.74 = 91,087.06/x
  3. Step 3: Cross multiply
    145,509.55x = 200,830.74 × 91,087.06
  4. Step 4: Simplify right side
    145,509.55x = 18,293,081,664.22
  5. Step 5: Solve for x
    x = 18,293,081,664.22/145,509.55
  6. Step 6: Final answer
    x = 125,717.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.