Home / 211,066.50-291,271.80-121,642.50

Finding the Fourth Proportional to 211,066.50, 291,271.80 and 121,642.50

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Solution

The fourth proportional to 211,066.50, 291,271.80 and 121,642.50 is: 167,866.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,066.50 : 291,271.80 = 121,642.50 : x
  2. Step 2: Convert to fraction form
    211,066.50/291,271.80 = 121,642.50/x
  3. Step 3: Cross multiply
    211,066.50x = 291,271.80 × 121,642.50
  4. Step 4: Simplify right side
    211,066.50x = 35,431,029,931.50
  5. Step 5: Solve for x
    x = 35,431,029,931.50/211,066.50
  6. Step 6: Final answer
    x = 167,866.67

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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.