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Finding the Fourth Proportional to 261,501.90, 392,058.45 and 143,306.70

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Solution

The fourth proportional to 261,501.90, 392,058.45 and 143,306.70 is: 214,853.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,501.90 : 392,058.45 = 143,306.70 : x
  2. Step 2: Convert to fraction form
    261,501.90/392,058.45 = 143,306.70/x
  3. Step 3: Cross multiply
    261,501.90x = 392,058.45 × 143,306.70
  4. Step 4: Simplify right side
    261,501.90x = 56,184,602,676.62
  5. Step 5: Solve for x
    x = 56,184,602,676.62/261,501.90
  6. Step 6: Final answer
    x = 214,853.52

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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.