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Finding the Fourth Proportional to 101,393.28, 139,840.56 and 77,482.08

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Solution

The fourth proportional to 101,393.28, 139,840.56 and 77,482.08 is: 106,862.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,393.28 : 139,840.56 = 77,482.08 : x
  2. Step 2: Convert to fraction form
    101,393.28/139,840.56 = 77,482.08/x
  3. Step 3: Cross multiply
    101,393.28x = 139,840.56 × 77,482.08
  4. Step 4: Simplify right side
    101,393.28x = 10,835,137,457.16
  5. Step 5: Solve for x
    x = 10,835,137,457.16/101,393.28
  6. Step 6: Final answer
    x = 106,862.48

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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.