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Finding the Fourth Proportional to 318,545.16, 477,817.71 and 81,888.06

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Solution

The fourth proportional to 318,545.16, 477,817.71 and 81,888.06 is: 122,832.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,545.16 : 477,817.71 = 81,888.06 : x
  2. Step 2: Convert to fraction form
    318,545.16/477,817.71 = 81,888.06/x
  3. Step 3: Cross multiply
    318,545.16x = 477,817.71 × 81,888.06
  4. Step 4: Simplify right side
    318,545.16x = 39,127,565,305.54
  5. Step 5: Solve for x
    x = 39,127,565,305.54/318,545.16
  6. Step 6: Final answer
    x = 122,832.08

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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.