Home / 77,111.20-115,666.80-47,562.40

Finding the Fourth Proportional to 77,111.20, 115,666.80 and 47,562.40

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Solution

The fourth proportional to 77,111.20, 115,666.80 and 47,562.40 is: 71,343.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,111.20 : 115,666.80 = 47,562.40 : x
  2. Step 2: Convert to fraction form
    77,111.20/115,666.80 = 47,562.40/x
  3. Step 3: Cross multiply
    77,111.20x = 115,666.80 × 47,562.40
  4. Step 4: Simplify right side
    77,111.20x = 5,501,390,608.32
  5. Step 5: Solve for x
    x = 5,501,390,608.32/77,111.20
  6. Step 6: Final answer
    x = 71,343.60

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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.