Home / 85,878,006.30-128,817,009.45-68,871,894.30

Finding the Fourth Proportional to 85,878,006.30, 128,817,009.45 and 68,871,894.30

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Solution

The fourth proportional to 85,878,006.30, 128,817,009.45 and 68,871,894.30 is: 103,307,841.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,878,006.30 : 128,817,009.45 = 68,871,894.30 : x
  2. Step 2: Convert to fraction form
    85,878,006.30/128,817,009.45 = 68,871,894.30/x
  3. Step 3: Cross multiply
    85,878,006.30x = 128,817,009.45 × 68,871,894.30
  4. Step 4: Simplify right side
    85,878,006.30x = 8,871,871,458,882,501
  5. Step 5: Solve for x
    x = 8,871,871,458,882,501/85,878,006.30
  6. Step 6: Final answer
    x = 103,307,841.45

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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.