Home / 287,528,085.80-431,292,128.70-115,128,625.40

Finding the Fourth Proportional to 287,528,085.80, 431,292,128.70 and 115,128,625.40

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Solution

The fourth proportional to 287,528,085.80, 431,292,128.70 and 115,128,625.40 is: 172,692,938.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,528,085.80 : 431,292,128.70 = 115,128,625.40 : x
  2. Step 2: Convert to fraction form
    287,528,085.80/431,292,128.70 = 115,128,625.40/x
  3. Step 3: Cross multiply
    287,528,085.80x = 431,292,128.70 × 115,128,625.40
  4. Step 4: Simplify right side
    287,528,085.80x = 49,654,069,923,070,888
  5. Step 5: Solve for x
    x = 49,654,069,923,070,888/287,528,085.80
  6. Step 6: Final answer
    x = 172,692,938.10

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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.