Home / 128,953.76-177,956.28-72,365.13

Finding the Fourth Proportional to 128,953.76, 177,956.28 and 72,365.13

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Solution

The fourth proportional to 128,953.76, 177,956.28 and 72,365.13 is: 99,863.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,953.76 : 177,956.28 = 72,365.13 : x
  2. Step 2: Convert to fraction form
    128,953.76/177,956.28 = 72,365.13/x
  3. Step 3: Cross multiply
    128,953.76x = 177,956.28 × 72,365.13
  4. Step 4: Simplify right side
    128,953.76x = 12,877,829,336.52
  5. Step 5: Solve for x
    x = 12,877,829,336.52/128,953.76
  6. Step 6: Final answer
    x = 99,863.93

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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.