Home / 121,415.90-182,123.85-81,758.30

Finding the Fourth Proportional to 121,415.90, 182,123.85 and 81,758.30

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Solution

The fourth proportional to 121,415.90, 182,123.85 and 81,758.30 is: 122,637.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,415.90 : 182,123.85 = 81,758.30 : x
  2. Step 2: Convert to fraction form
    121,415.90/182,123.85 = 81,758.30/x
  3. Step 3: Cross multiply
    121,415.90x = 182,123.85 × 81,758.30
  4. Step 4: Simplify right side
    121,415.90x = 14,890,136,365.46
  5. Step 5: Solve for x
    x = 14,890,136,365.46/121,415.90
  6. Step 6: Final answer
    x = 122,637.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.