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Finding the Fourth Proportional to 153,804.67, 212,250.18 and 85,817.50

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Solution

The fourth proportional to 153,804.67, 212,250.18 and 85,817.50 is: 118,428.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,804.67 : 212,250.18 = 85,817.50 : x
  2. Step 2: Convert to fraction form
    153,804.67/212,250.18 = 85,817.50/x
  3. Step 3: Cross multiply
    153,804.67x = 212,250.18 × 85,817.50
  4. Step 4: Simplify right side
    153,804.67x = 18,214,779,822.15
  5. Step 5: Solve for x
    x = 18,214,779,822.15/153,804.67
  6. Step 6: Final answer
    x = 118,428.00

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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.