Home / 78,347.18-117,570.28-40,974.32

Finding the Fourth Proportional to 78,347.18, 117,570.28 and 40,974.32

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Solution

The fourth proportional to 78,347.18, 117,570.28 and 40,974.32 is: 61,487.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,347.18 : 117,570.28 = 40,974.32 : x
  2. Step 2: Convert to fraction form
    78,347.18/117,570.28 = 40,974.32/x
  3. Step 3: Cross multiply
    78,347.18x = 117,570.28 × 40,974.32
  4. Step 4: Simplify right side
    78,347.18x = 4,817,362,275.21
  5. Step 5: Solve for x
    x = 4,817,362,275.21/78,347.18
  6. Step 6: Final answer
    x = 61,487.37

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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.