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Finding the Fourth Proportional to 103,353.78, 142,643.81 and 63,090.98

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Solution

The fourth proportional to 103,353.78, 142,643.81 and 63,090.98 is: 87,075.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,353.78 : 142,643.81 = 63,090.98 : x
  2. Step 2: Convert to fraction form
    103,353.78/142,643.81 = 63,090.98/x
  3. Step 3: Cross multiply
    103,353.78x = 142,643.81 × 63,090.98
  4. Step 4: Simplify right side
    103,353.78x = 8,999,537,208.34
  5. Step 5: Solve for x
    x = 8,999,537,208.34/103,353.78
  6. Step 6: Final answer
    x = 87,075.07

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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.