Home / 287,528,070.30-431,292,105.45-115,128,609.90

Finding the Fourth Proportional to 287,528,070.30, 431,292,105.45 and 115,128,609.90

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Solution

The fourth proportional to 287,528,070.30, 431,292,105.45 and 115,128,609.90 is: 172,692,914.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,528,070.30 : 431,292,105.45 = 115,128,609.90 : x
  2. Step 2: Convert to fraction form
    287,528,070.30/431,292,105.45 = 115,128,609.90/x
  3. Step 3: Cross multiply
    287,528,070.30x = 431,292,105.45 × 115,128,609.90
  4. Step 4: Simplify right side
    287,528,070.30x = 49,654,060,561,302,712
  5. Step 5: Solve for x
    x = 49,654,060,561,302,712/287,528,070.30
  6. Step 6: Final answer
    x = 172,692,914.85

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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.