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Finding the Fourth Proportional to 98,130.50, 135,420.09 and 53,418.50

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Solution

The fourth proportional to 98,130.50, 135,420.09 and 53,418.50 is: 73,717.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,130.50 : 135,420.09 = 53,418.50 : x
  2. Step 2: Convert to fraction form
    98,130.50/135,420.09 = 53,418.50/x
  3. Step 3: Cross multiply
    98,130.50x = 135,420.09 × 53,418.50
  4. Step 4: Simplify right side
    98,130.50x = 7,233,938,077.67
  5. Step 5: Solve for x
    x = 7,233,938,077.67/98,130.50
  6. Step 6: Final answer
    x = 73,717.53

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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.