Home / 129,265,031.76-178,440,786.38-86,903,159.56

Finding the Fourth Proportional to 129,265,031.76, 178,440,786.38 and 86,903,159.56

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Solution

The fourth proportional to 129,265,031.76, 178,440,786.38 and 86,903,159.56 is: 119,963,364.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,265,031.76 : 178,440,786.38 = 86,903,159.56 : x
  2. Step 2: Convert to fraction form
    129,265,031.76/178,440,786.38 = 86,903,159.56/x
  3. Step 3: Cross multiply
    129,265,031.76x = 178,440,786.38 × 86,903,159.56
  4. Step 4: Simplify right side
    129,265,031.76x = 15,507,068,130,793,014
  5. Step 5: Solve for x
    x = 15,507,068,130,793,014/129,265,031.76
  6. Step 6: Final answer
    x = 119,963,364.57

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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.