Home / 85,878,050.80-128,817,076.20-68,871,938.80

Finding the Fourth Proportional to 85,878,050.80, 128,817,076.20 and 68,871,938.80

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Solution

The fourth proportional to 85,878,050.80, 128,817,076.20 and 68,871,938.80 is: 103,307,908.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,878,050.80 : 128,817,076.20 = 68,871,938.80 : x
  2. Step 2: Convert to fraction form
    85,878,050.80/128,817,076.20 = 68,871,938.80/x
  3. Step 3: Cross multiply
    85,878,050.80x = 128,817,076.20 × 68,871,938.80
  4. Step 4: Simplify right side
    85,878,050.80x = 8,871,881,788,441,336
  5. Step 5: Solve for x
    x = 8,871,881,788,441,336/85,878,050.80
  6. Step 6: Final answer
    x = 103,307,908.20

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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.