Home / 145,389.65-200,638.55-81,726.89

Finding the Fourth Proportional to 145,389.65, 200,638.55 and 81,726.89

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Solution

The fourth proportional to 145,389.65, 200,638.55 and 81,726.89 is: 112,783.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,389.65 : 200,638.55 = 81,726.89 : x
  2. Step 2: Convert to fraction form
    145,389.65/200,638.55 = 81,726.89/x
  3. Step 3: Cross multiply
    145,389.65x = 200,638.55 × 81,726.89
  4. Step 4: Simplify right side
    145,389.65x = 16,397,563,906.73
  5. Step 5: Solve for x
    x = 16,397,563,906.73/145,389.65
  6. Step 6: Final answer
    x = 112,783.57

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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.