Home / 78,420.16-108,220.26-42,610.47

Finding the Fourth Proportional to 78,420.16, 108,220.26 and 42,610.47

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Solution

The fourth proportional to 78,420.16, 108,220.26 and 42,610.47 is: 58,802.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,420.16 : 108,220.26 = 42,610.47 : x
  2. Step 2: Convert to fraction form
    78,420.16/108,220.26 = 42,610.47/x
  3. Step 3: Cross multiply
    78,420.16x = 108,220.26 × 42,610.47
  4. Step 4: Simplify right side
    78,420.16x = 4,611,315,601.02
  5. Step 5: Solve for x
    x = 4,611,315,601.02/78,420.16
  6. Step 6: Final answer
    x = 58,802.68

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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.