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Finding the Fourth Proportional to 108,871,985.80, 163,307,978.70 and 28,092,953.80

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Solution

The fourth proportional to 108,871,985.80, 163,307,978.70 and 28,092,953.80 is: 42,139,430.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,871,985.80 : 163,307,978.70 = 28,092,953.80 : x
  2. Step 2: Convert to fraction form
    108,871,985.80/163,307,978.70 = 28,092,953.80/x
  3. Step 3: Cross multiply
    108,871,985.80x = 163,307,978.70 × 28,092,953.80
  4. Step 4: Simplify right side
    108,871,985.80x = 4,587,803,500,790,484
  5. Step 5: Solve for x
    x = 4,587,803,500,790,484/108,871,985.80
  6. Step 6: Final answer
    x = 42,139,430.70

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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.