Home / 78,485.22-117,737.96-28,557.63

Finding the Fourth Proportional to 78,485.22, 117,737.96 and 28,557.63

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Solution

The fourth proportional to 78,485.22, 117,737.96 and 28,557.63 is: 42,840.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,485.22 : 117,737.96 = 28,557.63 : x
  2. Step 2: Convert to fraction form
    78,485.22/117,737.96 = 28,557.63/x
  3. Step 3: Cross multiply
    78,485.22x = 117,737.96 × 28,557.63
  4. Step 4: Simplify right side
    78,485.22x = 3,362,316,955.85
  5. Step 5: Solve for x
    x = 3,362,316,955.85/78,485.22
  6. Step 6: Final answer
    x = 42,840.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.