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Finding the Fourth Proportional to 357,005.13, 535,511.18 and 90,765.64

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Solution

The fourth proportional to 357,005.13, 535,511.18 and 90,765.64 is: 136,149.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,005.13 : 535,511.18 = 90,765.64 : x
  2. Step 2: Convert to fraction form
    357,005.13/535,511.18 = 90,765.64/x
  3. Step 3: Cross multiply
    357,005.13x = 535,511.18 × 90,765.64
  4. Step 4: Simplify right side
    357,005.13x = 48,606,014,979.86
  5. Step 5: Solve for x
    x = 48,606,014,979.86/357,005.13
  6. Step 6: Final answer
    x = 136,149.35

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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.