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Finding the Fourth Proportional to 76,353.54, 105,387.93 and 42,830.34

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Solution

The fourth proportional to 76,353.54, 105,387.93 and 42,830.34 is: 59,117.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,353.54 : 105,387.93 = 42,830.34 : x
  2. Step 2: Convert to fraction form
    76,353.54/105,387.93 = 42,830.34/x
  3. Step 3: Cross multiply
    76,353.54x = 105,387.93 × 42,830.34
  4. Step 4: Simplify right side
    76,353.54x = 4,513,800,873.80
  5. Step 5: Solve for x
    x = 4,513,800,873.80/76,353.54
  6. Step 6: Final answer
    x = 59,117.11

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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.