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Finding the Fourth Proportional to 210,553.68, 290,567.88 and 115,064.40

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Solution

The fourth proportional to 210,553.68, 290,567.88 and 115,064.40 is: 158,790.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,553.68 : 290,567.88 = 115,064.40 : x
  2. Step 2: Convert to fraction form
    210,553.68/290,567.88 = 115,064.40/x
  3. Step 3: Cross multiply
    210,553.68x = 290,567.88 × 115,064.40
  4. Step 4: Simplify right side
    210,553.68x = 33,434,018,771.47
  5. Step 5: Solve for x
    x = 33,434,018,771.47/210,553.68
  6. Step 6: Final answer
    x = 158,790.95

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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.