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Finding the Fourth Proportional to 128,602,765.64, 177,473,060.40 and 69,865,851.08

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Solution

The fourth proportional to 128,602,765.64, 177,473,060.40 and 69,865,851.08 is: 96,415,550.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,602,765.64 : 177,473,060.40 = 69,865,851.08 : x
  2. Step 2: Convert to fraction form
    128,602,765.64/177,473,060.40 = 69,865,851.08/x
  3. Step 3: Cross multiply
    128,602,765.64x = 177,473,060.40 × 69,865,851.08
  4. Step 4: Simplify right side
    128,602,765.64x = 12,399,306,408,618,246
  5. Step 5: Solve for x
    x = 12,399,306,408,618,246/128,602,765.64
  6. Step 6: Final answer
    x = 96,415,550.22

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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.