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Finding the Fourth Proportional to 72,596,419.20, 108,894,628.80 and 65,877,955.20

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Solution

The fourth proportional to 72,596,419.20, 108,894,628.80 and 65,877,955.20 is: 98,816,932.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,596,419.20 : 108,894,628.80 = 65,877,955.20 : x
  2. Step 2: Convert to fraction form
    72,596,419.20/108,894,628.80 = 65,877,955.20/x
  3. Step 3: Cross multiply
    72,596,419.20x = 108,894,628.80 × 65,877,955.20
  4. Step 4: Simplify right side
    72,596,419.20x = 7,173,755,477,607,030
  5. Step 5: Solve for x
    x = 7,173,755,477,607,030/72,596,419.20
  6. Step 6: Final answer
    x = 98,816,932.80

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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.