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Finding the Fourth Proportional to 72,687,681.60, 109,031,522.40 and 49,729,430.40

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Solution

The fourth proportional to 72,687,681.60, 109,031,522.40 and 49,729,430.40 is: 74,594,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,687,681.60 : 109,031,522.40 = 49,729,430.40 : x
  2. Step 2: Convert to fraction form
    72,687,681.60/109,031,522.40 = 49,729,430.40/x
  3. Step 3: Cross multiply
    72,687,681.60x = 109,031,522.40 × 49,729,430.40
  4. Step 4: Simplify right side
    72,687,681.60x = 5,422,075,504,596,841
  5. Step 5: Solve for x
    x = 5,422,075,504,596,841/72,687,681.60
  6. Step 6: Final answer
    x = 74,594,145.60

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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.