Home / 129,155.98-178,237.40-71,015.17

Finding the Fourth Proportional to 129,155.98, 178,237.40 and 71,015.17

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Solution

The fourth proportional to 129,155.98, 178,237.40 and 71,015.17 is: 98,002.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,155.98 : 178,237.40 = 71,015.17 : x
  2. Step 2: Convert to fraction form
    129,155.98/178,237.40 = 71,015.17/x
  3. Step 3: Cross multiply
    129,155.98x = 178,237.40 × 71,015.17
  4. Step 4: Simplify right side
    129,155.98x = 12,657,559,261.36
  5. Step 5: Solve for x
    x = 12,657,559,261.36/129,155.98
  6. Step 6: Final answer
    x = 98,002.12

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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.