Home / 128,302.81-177,052.30-70,158.47

Finding the Fourth Proportional to 128,302.81, 177,052.30 and 70,158.47

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Solution

The fourth proportional to 128,302.81, 177,052.30 and 70,158.47 is: 96,815.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,302.81 : 177,052.30 = 70,158.47 : x
  2. Step 2: Convert to fraction form
    128,302.81/177,052.30 = 70,158.47/x
  3. Step 3: Cross multiply
    128,302.81x = 177,052.30 × 70,158.47
  4. Step 4: Simplify right side
    128,302.81x = 12,421,717,417.32
  5. Step 5: Solve for x
    x = 12,421,717,417.32/128,302.81
  6. Step 6: Final answer
    x = 96,815.63

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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.