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Finding the Fourth Proportional to 136,988.58, 205,482.60 and 51,615.40

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Solution

The fourth proportional to 136,988.58, 205,482.60 and 51,615.40 is: 77,423.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,988.58 : 205,482.60 = 51,615.40 : x
  2. Step 2: Convert to fraction form
    136,988.58/205,482.60 = 51,615.40/x
  3. Step 3: Cross multiply
    136,988.58x = 205,482.60 × 51,615.40
  4. Step 4: Simplify right side
    136,988.58x = 10,606,066,592.04
  5. Step 5: Solve for x
    x = 10,606,066,592.04/136,988.58
  6. Step 6: Final answer
    x = 77,423.00

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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.