Home / 287,478,125.60-431,217,188.40-105,687,687.20

Finding the Fourth Proportional to 287,478,125.60, 431,217,188.40 and 105,687,687.20

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Solution

The fourth proportional to 287,478,125.60, 431,217,188.40 and 105,687,687.20 is: 158,531,530.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,478,125.60 : 431,217,188.40 = 105,687,687.20 : x
  2. Step 2: Convert to fraction form
    287,478,125.60/431,217,188.40 = 105,687,687.20/x
  3. Step 3: Cross multiply
    287,478,125.60x = 431,217,188.40 × 105,687,687.20
  4. Step 4: Simplify right side
    287,478,125.60x = 45,574,347,322,882,664
  5. Step 5: Solve for x
    x = 45,574,347,322,882,664/287,478,125.60
  6. Step 6: Final answer
    x = 158,531,530.80

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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.