Home / 287,070.43-430,667.88-87,385.60

Finding the Fourth Proportional to 287,070.43, 430,667.88 and 87,385.60

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Solution

The fourth proportional to 287,070.43, 430,667.88 and 87,385.60 is: 131,097.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,070.43 : 430,667.88 = 87,385.60 : x
  2. Step 2: Convert to fraction form
    287,070.43/430,667.88 = 87,385.60/x
  3. Step 3: Cross multiply
    287,070.43x = 430,667.88 × 87,385.60
  4. Step 4: Simplify right side
    287,070.43x = 37,634,171,094.53
  5. Step 5: Solve for x
    x = 37,634,171,094.53/287,070.43
  6. Step 6: Final answer
    x = 131,097.34

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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.