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Finding the Fourth Proportional to 103,655.93, 155,790.62 and 86,001.11

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Solution

The fourth proportional to 103,655.93, 155,790.62 and 86,001.11 is: 129,256.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,655.93 : 155,790.62 = 86,001.11 : x
  2. Step 2: Convert to fraction form
    103,655.93/155,790.62 = 86,001.11/x
  3. Step 3: Cross multiply
    103,655.93x = 155,790.62 × 86,001.11
  4. Step 4: Simplify right side
    103,655.93x = 13,398,165,038.63
  5. Step 5: Solve for x
    x = 13,398,165,038.63/103,655.93
  6. Step 6: Final answer
    x = 129,256.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.