Home / 257,909,608.40-386,864,412.60-85,413,045.20

Finding the Fourth Proportional to 257,909,608.40, 386,864,412.60 and 85,413,045.20

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Solution

The fourth proportional to 257,909,608.40, 386,864,412.60 and 85,413,045.20 is: 128,119,567.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,909,608.40 : 386,864,412.60 = 85,413,045.20 : x
  2. Step 2: Convert to fraction form
    257,909,608.40/386,864,412.60 = 85,413,045.20/x
  3. Step 3: Cross multiply
    257,909,608.40x = 386,864,412.60 × 85,413,045.20
  4. Step 4: Simplify right side
    257,909,608.40x = 33,043,267,559,675,252
  5. Step 5: Solve for x
    x = 33,043,267,559,675,252/257,909,608.40
  6. Step 6: Final answer
    x = 128,119,567.80

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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.