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Finding the Fourth Proportional to 423,534.80, 635,167.48 and 139,159.80

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Solution

The fourth proportional to 423,534.80, 635,167.48 and 139,159.80 is: 208,695.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,534.80 : 635,167.48 = 139,159.80 : x
  2. Step 2: Convert to fraction form
    423,534.80/635,167.48 = 139,159.80/x
  3. Step 3: Cross multiply
    423,534.80x = 635,167.48 × 139,159.80
  4. Step 4: Simplify right side
    423,534.80x = 88,389,779,483.30
  5. Step 5: Solve for x
    x = 88,389,779,483.30/423,534.80
  6. Step 6: Final answer
    x = 208,695.44

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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.