Home / 78,938.16-108,928.44-45,406.32

Finding the Fourth Proportional to 78,938.16, 108,928.44 and 45,406.32

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Solution

The fourth proportional to 78,938.16, 108,928.44 and 45,406.32 is: 62,657.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,938.16 : 108,928.44 = 45,406.32 : x
  2. Step 2: Convert to fraction form
    78,938.16/108,928.44 = 45,406.32/x
  3. Step 3: Cross multiply
    78,938.16x = 108,928.44 × 45,406.32
  4. Step 4: Simplify right side
    78,938.16x = 4,946,039,603.74
  5. Step 5: Solve for x
    x = 4,946,039,603.74/78,938.16
  6. Step 6: Final answer
    x = 62,657.14

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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.