Home / 137,928.04-190,340.82-78,312.04

Finding the Fourth Proportional to 137,928.04, 190,340.82 and 78,312.04

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Solution

The fourth proportional to 137,928.04, 190,340.82 and 78,312.04 is: 108,070.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,928.04 : 190,340.82 = 78,312.04 : x
  2. Step 2: Convert to fraction form
    137,928.04/190,340.82 = 78,312.04/x
  3. Step 3: Cross multiply
    137,928.04x = 190,340.82 × 78,312.04
  4. Step 4: Simplify right side
    137,928.04x = 14,905,977,909.47
  5. Step 5: Solve for x
    x = 14,905,977,909.47/137,928.04
  6. Step 6: Final answer
    x = 108,070.69

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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.