Home / 286,438.68-429,510.40-128,531.81

Finding the Fourth Proportional to 286,438.68, 429,510.40 and 128,531.81

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Solution

The fourth proportional to 286,438.68, 429,510.40 and 128,531.81 is: 192,731.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,438.68 : 429,510.40 = 128,531.81 : x
  2. Step 2: Convert to fraction form
    286,438.68/429,510.40 = 128,531.81/x
  3. Step 3: Cross multiply
    286,438.68x = 429,510.40 × 128,531.81
  4. Step 4: Simplify right side
    286,438.68x = 55,205,749,878.27
  5. Step 5: Solve for x
    x = 55,205,749,878.27/286,438.68
  6. Step 6: Final answer
    x = 192,731.48

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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.