Home / 78,330.47-108,098.00-42,520.48

Finding the Fourth Proportional to 78,330.47, 108,098.00 and 42,520.48

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Solution

The fourth proportional to 78,330.47, 108,098.00 and 42,520.48 is: 58,679.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,330.47 : 108,098.00 = 42,520.48 : x
  2. Step 2: Convert to fraction form
    78,330.47/108,098.00 = 42,520.48/x
  3. Step 3: Cross multiply
    78,330.47x = 108,098.00 × 42,520.48
  4. Step 4: Simplify right side
    78,330.47x = 4,596,378,466.00
  5. Step 5: Solve for x
    x = 4,596,378,466.00/78,330.47
  6. Step 6: Final answer
    x = 58,679.32

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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.