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Finding the Fourth Proportional to 208,590,685.04, 287,869,694.67 and 137,903,482.37

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Solution

The fourth proportional to 208,590,685.04, 287,869,694.67 and 137,903,482.37 is: 190,316,424.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,590,685.04 : 287,869,694.67 = 137,903,482.37 : x
  2. Step 2: Convert to fraction form
    208,590,685.04/287,869,694.67 = 137,903,482.37/x
  3. Step 3: Cross multiply
    208,590,685.04x = 287,869,694.67 × 137,903,482.37
  4. Step 4: Simplify right side
    208,590,685.04x = 39,698,233,364,501,304
  5. Step 5: Solve for x
    x = 39,698,233,364,501,304/208,590,685.04
  6. Step 6: Final answer
    x = 190,316,424.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.