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Finding the Fourth Proportional to 357,054.55, 535,579.50 and 90,812.76

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Solution

The fourth proportional to 357,054.55, 535,579.50 and 90,812.76 is: 136,218.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,054.55 : 535,579.50 = 90,812.76 : x
  2. Step 2: Convert to fraction form
    357,054.55/535,579.50 = 90,812.76/x
  3. Step 3: Cross multiply
    357,054.55x = 535,579.50 × 90,812.76
  4. Step 4: Simplify right side
    357,054.55x = 48,637,452,594.42
  5. Step 5: Solve for x
    x = 48,637,452,594.42/357,054.55
  6. Step 6: Final answer
    x = 136,218.55

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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.