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Finding the Fourth Proportional to 139,887.95, 193,038.80 and 79,450.74

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Solution

The fourth proportional to 139,887.95, 193,038.80 and 79,450.74 is: 109,638.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,887.95 : 193,038.80 = 79,450.74 : x
  2. Step 2: Convert to fraction form
    139,887.95/193,038.80 = 79,450.74/x
  3. Step 3: Cross multiply
    139,887.95x = 193,038.80 × 79,450.74
  4. Step 4: Simplify right side
    139,887.95x = 15,337,075,111.46
  5. Step 5: Solve for x
    x = 15,337,075,111.46/139,887.95
  6. Step 6: Final answer
    x = 109,638.29

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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.