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Finding the Fourth Proportional to 101,159, 139,603.80 and 56,447

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Solution

The fourth proportional to 101,159, 139,603.80 and 56,447 is: 77,899.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,159 : 139,603.80 = 56,447 : x
  2. Step 2: Convert to fraction form
    101,159/139,603.80 = 56,447/x
  3. Step 3: Cross multiply
    101,159x = 139,603.80 × 56,447
  4. Step 4: Simplify right side
    101,159x = 7,880,215,698.60
  5. Step 5: Solve for x
    x = 7,880,215,698.60/101,159
  6. Step 6: Final answer
    x = 77,899.30

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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.