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Finding the Fourth Proportional to 70,459,427.80, 105,654,564.01 and 28,952,784.78

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Solution

The fourth proportional to 70,459,427.80, 105,654,564.01 and 28,952,784.78 is: 43,414,968.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,459,427.80 : 105,654,564.01 = 28,952,784.78 : x
  2. Step 2: Convert to fraction form
    70,459,427.80/105,654,564.01 = 28,952,784.78/x
  3. Step 3: Cross multiply
    70,459,427.80x = 105,654,564.01 × 28,952,784.78
  4. Step 4: Simplify right side
    70,459,427.80x = 3,058,993,852,806,264
  5. Step 5: Solve for x
    x = 3,058,993,852,806,264/70,459,427.80
  6. Step 6: Final answer
    x = 43,414,968.70

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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.