Home / 286,905.81-430,343.13-87,210.63

Finding the Fourth Proportional to 286,905.81, 430,343.13 and 87,210.63

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Solution

The fourth proportional to 286,905.81, 430,343.13 and 87,210.63 is: 130,811.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,905.81 : 430,343.13 = 87,210.63 : x
  2. Step 2: Convert to fraction form
    286,905.81/430,343.13 = 87,210.63/x
  3. Step 3: Cross multiply
    286,905.81x = 430,343.13 × 87,210.63
  4. Step 4: Simplify right side
    286,905.81x = 37,530,495,483.47
  5. Step 5: Solve for x
    x = 37,530,495,483.47/286,905.81
  6. Step 6: Final answer
    x = 130,811.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.