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Finding the Fourth Proportional to 55,389.60, 76,323.60 and 42,775.20

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Solution

The fourth proportional to 55,389.60, 76,323.60 and 42,775.20 is: 58,941.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,389.60 : 76,323.60 = 42,775.20 : x
  2. Step 2: Convert to fraction form
    55,389.60/76,323.60 = 42,775.20/x
  3. Step 3: Cross multiply
    55,389.60x = 76,323.60 × 42,775.20
  4. Step 4: Simplify right side
    55,389.60x = 3,264,757,254.72
  5. Step 5: Solve for x
    x = 3,264,757,254.72/55,389.60
  6. Step 6: Final answer
    x = 58,941.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.