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Finding the Fourth Proportional to 72,693.30, 109,039.95 and 47,810.10

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Solution

The fourth proportional to 72,693.30, 109,039.95 and 47,810.10 is: 71,715.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,693.30 : 109,039.95 = 47,810.10 : x
  2. Step 2: Convert to fraction form
    72,693.30/109,039.95 = 47,810.10/x
  3. Step 3: Cross multiply
    72,693.30x = 109,039.95 × 47,810.10
  4. Step 4: Simplify right side
    72,693.30x = 5,213,210,913.50
  5. Step 5: Solve for x
    x = 5,213,210,913.50/72,693.30
  6. Step 6: Final answer
    x = 71,715.15

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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.