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Finding the Fourth Proportional to 81,513.87, 112,487.70 and 45,703.77

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Solution

The fourth proportional to 81,513.87, 112,487.70 and 45,703.77 is: 63,070.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,513.87 : 112,487.70 = 45,703.77 : x
  2. Step 2: Convert to fraction form
    81,513.87/112,487.70 = 45,703.77/x
  3. Step 3: Cross multiply
    81,513.87x = 112,487.70 × 45,703.77
  4. Step 4: Simplify right side
    81,513.87x = 5,141,111,968.63
  5. Step 5: Solve for x
    x = 5,141,111,968.63/81,513.87
  6. Step 6: Final answer
    x = 63,070.39

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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.