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Finding the Fourth Proportional to 81,468.96, 112,415.76 and 45,656.16

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Solution

The fourth proportional to 81,468.96, 112,415.76 and 45,656.16 is: 62,999.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,468.96 : 112,415.76 = 45,656.16 : x
  2. Step 2: Convert to fraction form
    81,468.96/112,415.76 = 45,656.16/x
  3. Step 3: Cross multiply
    81,468.96x = 112,415.76 × 45,656.16
  4. Step 4: Simplify right side
    81,468.96x = 5,132,471,925.08
  5. Step 5: Solve for x
    x = 5,132,471,925.08/81,468.96
  6. Step 6: Final answer
    x = 62,999.11

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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.