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Finding the Fourth Proportional to 78,718.99, 108,643.53 and 46,888.42

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Solution

The fourth proportional to 78,718.99, 108,643.53 and 46,888.42 is: 64,712.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,718.99 : 108,643.53 = 46,888.42 : x
  2. Step 2: Convert to fraction form
    78,718.99/108,643.53 = 46,888.42/x
  3. Step 3: Cross multiply
    78,718.99x = 108,643.53 × 46,888.42
  4. Step 4: Simplify right side
    78,718.99x = 5,094,123,464.92
  5. Step 5: Solve for x
    x = 5,094,123,464.92/78,718.99
  6. Step 6: Final answer
    x = 64,712.76

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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.