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Finding the Fourth Proportional to 85,430.51, 117,893.64 and 47,192.69

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Solution

The fourth proportional to 85,430.51, 117,893.64 and 47,192.69 is: 65,125.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,430.51 : 117,893.64 = 47,192.69 : x
  2. Step 2: Convert to fraction form
    85,430.51/117,893.64 = 47,192.69/x
  3. Step 3: Cross multiply
    85,430.51x = 117,893.64 × 47,192.69
  4. Step 4: Simplify right side
    85,430.51x = 5,563,717,769.53
  5. Step 5: Solve for x
    x = 5,563,717,769.53/85,430.51
  6. Step 6: Final answer
    x = 65,125.65

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1.5x scale

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.