Home / 128,047.63-176,701.09-70,685.72

Finding the Fourth Proportional to 128,047.63, 176,701.09 and 70,685.72

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Solution

The fourth proportional to 128,047.63, 176,701.09 and 70,685.72 is: 97,543.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,047.63 : 176,701.09 = 70,685.72 : x
  2. Step 2: Convert to fraction form
    128,047.63/176,701.09 = 70,685.72/x
  3. Step 3: Cross multiply
    128,047.63x = 176,701.09 × 70,685.72
  4. Step 4: Simplify right side
    128,047.63x = 12,490,243,440.14
  5. Step 5: Solve for x
    x = 12,490,243,440.14/128,047.63
  6. Step 6: Final answer
    x = 97,543.73

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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.