Home / 129,427.51-178,573.95-77,730.81

Finding the Fourth Proportional to 129,427.51, 178,573.95 and 77,730.81

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Solution

The fourth proportional to 129,427.51, 178,573.95 and 77,730.81 is: 107,246.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,427.51 : 178,573.95 = 77,730.81 : x
  2. Step 2: Convert to fraction form
    129,427.51/178,573.95 = 77,730.81/x
  3. Step 3: Cross multiply
    129,427.51x = 178,573.95 × 77,730.81
  4. Step 4: Simplify right side
    129,427.51x = 13,880,697,778.40
  5. Step 5: Solve for x
    x = 13,880,697,778.40/129,427.51
  6. Step 6: Final answer
    x = 107,246.89

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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.