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Finding the Fourth Proportional to 45,875.80, 68,748.90 and 28,293.40

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Solution

The fourth proportional to 45,875.80, 68,748.90 and 28,293.40 is: 42,400.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,875.80 : 68,748.90 = 28,293.40 : x
  2. Step 2: Convert to fraction form
    45,875.80/68,748.90 = 28,293.40/x
  3. Step 3: Cross multiply
    45,875.80x = 68,748.90 × 28,293.40
  4. Step 4: Simplify right side
    45,875.80x = 1,945,140,127.26
  5. Step 5: Solve for x
    x = 1,945,140,127.26/45,875.80
  6. Step 6: Final answer
    x = 42,400.14

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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.