Home / 129,615.96-178,920.18-101,330.76

Finding the Fourth Proportional to 129,615.96, 178,920.18 and 101,330.76

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Solution

The fourth proportional to 129,615.96, 178,920.18 and 101,330.76 is: 139,875.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,615.96 : 178,920.18 = 101,330.76 : x
  2. Step 2: Convert to fraction form
    129,615.96/178,920.18 = 101,330.76/x
  3. Step 3: Cross multiply
    129,615.96x = 178,920.18 × 101,330.76
  4. Step 4: Simplify right side
    129,615.96x = 18,130,117,818.74
  5. Step 5: Solve for x
    x = 18,130,117,818.74/129,615.96
  6. Step 6: Final answer
    x = 139,875.66

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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.