Home / 72,139.26-99,545.07-40,307.46

Finding the Fourth Proportional to 72,139.26, 99,545.07 and 40,307.46

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Solution

The fourth proportional to 72,139.26, 99,545.07 and 40,307.46 is: 55,620.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,139.26 : 99,545.07 = 40,307.46 : x
  2. Step 2: Convert to fraction form
    72,139.26/99,545.07 = 40,307.46/x
  3. Step 3: Cross multiply
    72,139.26x = 99,545.07 × 40,307.46
  4. Step 4: Simplify right side
    72,139.26x = 4,012,408,927.22
  5. Step 5: Solve for x
    x = 4,012,408,927.22/72,139.26
  6. Step 6: Final answer
    x = 55,620.32

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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.