Home / 131,417.60-197,126.40-78,886.40

Finding the Fourth Proportional to 131,417.60, 197,126.40 and 78,886.40

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Solution

The fourth proportional to 131,417.60, 197,126.40 and 78,886.40 is: 118,329.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,417.60 : 197,126.40 = 78,886.40 : x
  2. Step 2: Convert to fraction form
    131,417.60/197,126.40 = 78,886.40/x
  3. Step 3: Cross multiply
    131,417.60x = 197,126.40 × 78,886.40
  4. Step 4: Simplify right side
    131,417.60x = 15,550,592,040.96
  5. Step 5: Solve for x
    x = 15,550,592,040.96/131,417.60
  6. Step 6: Final answer
    x = 118,329.60

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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.