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Finding the Fourth Proportional to 78,247.83, 108,023.86 and 61,215.87

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Solution

The fourth proportional to 78,247.83, 108,023.86 and 61,215.87 is: 84,510.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,247.83 : 108,023.86 = 61,215.87 : x
  2. Step 2: Convert to fraction form
    78,247.83/108,023.86 = 61,215.87/x
  3. Step 3: Cross multiply
    78,247.83x = 108,023.86 × 61,215.87
  4. Step 4: Simplify right side
    78,247.83x = 6,612,774,570.66
  5. Step 5: Solve for x
    x = 6,612,774,570.66/78,247.83
  6. Step 6: Final answer
    x = 84,510.64

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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.