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Finding the Fourth Proportional to 103,539.90, 155,309.85 and 91,730.10

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Solution

The fourth proportional to 103,539.90, 155,309.85 and 91,730.10 is: 137,595.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,539.90 : 155,309.85 = 91,730.10 : x
  2. Step 2: Convert to fraction form
    103,539.90/155,309.85 = 91,730.10/x
  3. Step 3: Cross multiply
    103,539.90x = 155,309.85 × 91,730.10
  4. Step 4: Simplify right side
    103,539.90x = 14,246,588,071.49
  5. Step 5: Solve for x
    x = 14,246,588,071.49/103,539.90
  6. Step 6: Final answer
    x = 137,595.15

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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.