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Finding the Fourth Proportional to 108,866,978.30, 163,111,510.65 and 70,508,747.90

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Solution

The fourth proportional to 108,866,978.30, 163,111,510.65 and 70,508,747.90 is: 105,640,742.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,866,978.30 : 163,111,510.65 = 70,508,747.90 : x
  2. Step 2: Convert to fraction form
    108,866,978.30/163,111,510.65 = 70,508,747.90/x
  3. Step 3: Cross multiply
    108,866,978.30x = 163,111,510.65 × 70,508,747.90
  4. Step 4: Simplify right side
    108,866,978.30x = 11,500,788,384,009,016
  5. Step 5: Solve for x
    x = 11,500,788,384,009,016/108,866,978.30
  6. Step 6: Final answer
    x = 105,640,742.16

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.