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Finding the Fourth Proportional to 103,688,656.80, 155,532,985.20 and 65,225,450.40

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Solution

The fourth proportional to 103,688,656.80, 155,532,985.20 and 65,225,450.40 is: 97,838,175.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,688,656.80 : 155,532,985.20 = 65,225,450.40 : x
  2. Step 2: Convert to fraction form
    103,688,656.80/155,532,985.20 = 65,225,450.40/x
  3. Step 3: Cross multiply
    103,688,656.80x = 155,532,985.20 × 65,225,450.40
  4. Step 4: Simplify right side
    103,688,656.80x = 10,144,709,011,726,534
  5. Step 5: Solve for x
    x = 10,144,709,011,726,534/103,688,656.80
  6. Step 6: Final answer
    x = 97,838,175.60

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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.