Home / 92,985.12-128,318.70-50,543.52

Finding the Fourth Proportional to 92,985.12, 128,318.70 and 50,543.52

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Solution

The fourth proportional to 92,985.12, 128,318.70 and 50,543.52 is: 69,749.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,985.12 : 128,318.70 = 50,543.52 : x
  2. Step 2: Convert to fraction form
    92,985.12/128,318.70 = 50,543.52/x
  3. Step 3: Cross multiply
    92,985.12x = 128,318.70 × 50,543.52
  4. Step 4: Simplify right side
    92,985.12x = 6,485,678,779.82
  5. Step 5: Solve for x
    x = 6,485,678,779.82/92,985.12
  6. Step 6: Final answer
    x = 69,749.64

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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.