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Finding the Fourth Proportional to 108,871,978.80, 163,119,011.40 and 70,513,748.40

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Solution

The fourth proportional to 108,871,978.80, 163,119,011.40 and 70,513,748.40 is: 105,648,239.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,871,978.80 : 163,119,011.40 = 70,513,748.40 : x
  2. Step 2: Convert to fraction form
    108,871,978.80/163,119,011.40 = 70,513,748.40/x
  3. Step 3: Cross multiply
    108,871,978.80x = 163,119,011.40 × 70,513,748.40
  4. Step 4: Simplify right side
    108,871,978.80x = 11,502,132,929,116,334
  5. Step 5: Solve for x
    x = 11,502,132,929,116,334/108,871,978.80
  6. Step 6: Final answer
    x = 105,648,239.85

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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.