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Finding the Fourth Proportional to 103,655.20, 155,483.10 and 28,779.40

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Solution

The fourth proportional to 103,655.20, 155,483.10 and 28,779.40 is: 43,169.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,655.20 : 155,483.10 = 28,779.40 : x
  2. Step 2: Convert to fraction form
    103,655.20/155,483.10 = 28,779.40/x
  3. Step 3: Cross multiply
    103,655.20x = 155,483.10 × 28,779.40
  4. Step 4: Simplify right side
    103,655.20x = 4,474,710,328.14
  5. Step 5: Solve for x
    x = 4,474,710,328.14/103,655.20
  6. Step 6: Final answer
    x = 43,169.18

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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.