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Finding the Fourth Proportional to 145,245.65, 200,431.73 and 87,897.65

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Solution

The fourth proportional to 145,245.65, 200,431.73 and 87,897.65 is: 121,294.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,245.65 : 200,431.73 = 87,897.65 : x
  2. Step 2: Convert to fraction form
    145,245.65/200,431.73 = 87,897.65/x
  3. Step 3: Cross multiply
    145,245.65x = 200,431.73 × 87,897.65
  4. Step 4: Simplify right side
    145,245.65x = 17,617,477,270.02
  5. Step 5: Solve for x
    x = 17,617,477,270.02/145,245.65
  6. Step 6: Final answer
    x = 121,294.36

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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.