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Finding the Fourth Proportional to 162,312.51, 223,990.79 and 90,692.59

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Solution

The fourth proportional to 162,312.51, 223,990.79 and 90,692.59 is: 125,155.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,312.51 : 223,990.79 = 90,692.59 : x
  2. Step 2: Convert to fraction form
    162,312.51/223,990.79 = 90,692.59/x
  3. Step 3: Cross multiply
    162,312.51x = 223,990.79 × 90,692.59
  4. Step 4: Simplify right side
    162,312.51x = 20,314,304,881.25
  5. Step 5: Solve for x
    x = 20,314,304,881.25/162,312.51
  6. Step 6: Final answer
    x = 125,155.51

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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.