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Finding the Fourth Proportional to 74,902,643.60, 112,353,965.40 and 21,049,955.60

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Solution

The fourth proportional to 74,902,643.60, 112,353,965.40 and 21,049,955.60 is: 31,574,933.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,902,643.60 : 112,353,965.40 = 21,049,955.60 : x
  2. Step 2: Convert to fraction form
    74,902,643.60/112,353,965.40 = 21,049,955.60/x
  3. Step 3: Cross multiply
    74,902,643.60x = 112,353,965.40 × 21,049,955.60
  4. Step 4: Simplify right side
    74,902,643.60x = 2,365,045,983,153,936.50
  5. Step 5: Solve for x
    x = 2,365,045,983,153,936.50/74,902,643.60
  6. Step 6: Final answer
    x = 31,574,933.40

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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.