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Finding the Fourth Proportional to 88,899.90, 133,090.65 and 86,307.90

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Solution

The fourth proportional to 88,899.90, 133,090.65 and 86,307.90 is: 129,210.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,899.90 : 133,090.65 = 86,307.90 : x
  2. Step 2: Convert to fraction form
    88,899.90/133,090.65 = 86,307.90/x
  3. Step 3: Cross multiply
    88,899.90x = 133,090.65 × 86,307.90
  4. Step 4: Simplify right side
    88,899.90x = 11,486,774,511.14
  5. Step 5: Solve for x
    x = 11,486,774,511.14/88,899.90
  6. Step 6: Final answer
    x = 129,210.21

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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.