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Finding the Fourth Proportional to 235,420.20, 353,130.30 and 77,640.30

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Solution

The fourth proportional to 235,420.20, 353,130.30 and 77,640.30 is: 116,460.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,420.20 : 353,130.30 = 77,640.30 : x
  2. Step 2: Convert to fraction form
    235,420.20/353,130.30 = 77,640.30/x
  3. Step 3: Cross multiply
    235,420.20x = 353,130.30 × 77,640.30
  4. Step 4: Simplify right side
    235,420.20x = 27,417,142,431.09
  5. Step 5: Solve for x
    x = 27,417,142,431.09/235,420.20
  6. Step 6: Final answer
    x = 116,460.45

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1.5x scale

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.