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Finding the Fourth Proportional to 253,553.91, 349,903.10 and 138,830.47

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Solution

The fourth proportional to 253,553.91, 349,903.10 and 138,830.47 is: 191,585.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,553.91 : 349,903.10 = 138,830.47 : x
  2. Step 2: Convert to fraction form
    253,553.91/349,903.10 = 138,830.47/x
  3. Step 3: Cross multiply
    253,553.91x = 349,903.10 × 138,830.47
  4. Step 4: Simplify right side
    253,553.91x = 48,577,211,827.46
  5. Step 5: Solve for x
    x = 48,577,211,827.46/253,553.91
  6. Step 6: Final answer
    x = 191,585.34

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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.