Home / 98,935.48-136,712-72,031.28

Finding the Fourth Proportional to 98,935.48, 136,712 and 72,031.28

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Solution

The fourth proportional to 98,935.48, 136,712 and 72,031.28 is: 99,534.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,935.48 : 136,712 = 72,031.28 : x
  2. Step 2: Convert to fraction form
    98,935.48/136,712 = 72,031.28/x
  3. Step 3: Cross multiply
    98,935.48x = 136,712 × 72,031.28
  4. Step 4: Simplify right side
    98,935.48x = 9,847,540,351.36
  5. Step 5: Solve for x
    x = 9,847,540,351.36/98,935.48
  6. Step 6: Final answer
    x = 99,534.97

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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.