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Finding the Fourth Proportional to 352,261.60, 528,063.60 and 139,031.20

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Solution

The fourth proportional to 352,261.60, 528,063.60 and 139,031.20 is: 208,417.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,261.60 : 528,063.60 = 139,031.20 : x
  2. Step 2: Convert to fraction form
    352,261.60/528,063.60 = 139,031.20/x
  3. Step 3: Cross multiply
    352,261.60x = 528,063.60 × 139,031.20
  4. Step 4: Simplify right side
    352,261.60x = 73,417,315,984.32
  5. Step 5: Solve for x
    x = 73,417,315,984.32/352,261.60
  6. Step 6: Final answer
    x = 208,417.03

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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.