Home / 103,688.08-155,510.85-28,789.40

Finding the Fourth Proportional to 103,688.08, 155,510.85 and 28,789.40

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Solution

The fourth proportional to 103,688.08, 155,510.85 and 28,789.40 is: 43,178.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,688.08 : 155,510.85 = 28,789.40 : x
  2. Step 2: Convert to fraction form
    103,688.08/155,510.85 = 28,789.40/x
  3. Step 3: Cross multiply
    103,688.08x = 155,510.85 × 28,789.40
  4. Step 4: Simplify right side
    103,688.08x = 4,477,064,064.99
  5. Step 5: Solve for x
    x = 4,477,064,064.99/103,688.08
  6. Step 6: Final answer
    x = 43,178.19

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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.