Home / 72,138.51-99,550.93-40,307.43

Finding the Fourth Proportional to 72,138.51, 99,550.93 and 40,307.43

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Solution

The fourth proportional to 72,138.51, 99,550.93 and 40,307.43 is: 55,624.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,138.51 : 99,550.93 = 40,307.43 : x
  2. Step 2: Convert to fraction form
    72,138.51/99,550.93 = 40,307.43/x
  3. Step 3: Cross multiply
    72,138.51x = 99,550.93 × 40,307.43
  4. Step 4: Simplify right side
    72,138.51x = 4,012,641,792.76
  5. Step 5: Solve for x
    x = 4,012,641,792.76/72,138.51
  6. Step 6: Final answer
    x = 55,624.13

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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.