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Finding the Fourth Proportional to 65,779.17, 90,705.17 and 53,018.94

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Solution

The fourth proportional to 65,779.17, 90,705.17 and 53,018.94 is: 73,109.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,779.17 : 90,705.17 = 53,018.94 : x
  2. Step 2: Convert to fraction form
    65,779.17/90,705.17 = 53,018.94/x
  3. Step 3: Cross multiply
    65,779.17x = 90,705.17 × 53,018.94
  4. Step 4: Simplify right side
    65,779.17x = 4,809,091,700.83
  5. Step 5: Solve for x
    x = 4,809,091,700.83/65,779.17
  6. Step 6: Final answer
    x = 73,109.64

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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.