Home / 209,421.80-289,008.57-118,781.45

Finding the Fourth Proportional to 209,421.80, 289,008.57 and 118,781.45

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Solution

The fourth proportional to 209,421.80, 289,008.57 and 118,781.45 is: 163,922.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,421.80 : 289,008.57 = 118,781.45 : x
  2. Step 2: Convert to fraction form
    209,421.80/289,008.57 = 118,781.45/x
  3. Step 3: Cross multiply
    209,421.80x = 289,008.57 × 118,781.45
  4. Step 4: Simplify right side
    209,421.80x = 34,328,855,561.98
  5. Step 5: Solve for x
    x = 34,328,855,561.98/209,421.80
  6. Step 6: Final answer
    x = 163,922.08

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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.