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Finding the Fourth Proportional to 76,673.80, 105,812.88 and 42,683.80

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Solution

The fourth proportional to 76,673.80, 105,812.88 and 42,683.80 is: 58,905.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,673.80 : 105,812.88 = 42,683.80 : x
  2. Step 2: Convert to fraction form
    76,673.80/105,812.88 = 42,683.80/x
  3. Step 3: Cross multiply
    76,673.80x = 105,812.88 × 42,683.80
  4. Step 4: Simplify right side
    76,673.80x = 4,516,495,807.34
  5. Step 5: Solve for x
    x = 4,516,495,807.34/76,673.80
  6. Step 6: Final answer
    x = 58,905.33

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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.